/*
Theme Name: Lionel Portfolio
Theme URI: https://theairtisan.com/
Author: AI Assistant
Version: 1.0
Description: Custom theme emulating yan-holtz.com for Lionel da Silva's data science portfolio.
*/

/* Import fonts - Yan Holtz style */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700&display=swap');

/* CSS Variables */
:root {
    --primary-color: #6366f1;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --max-width: 1200px;
    --transition: all 0.3s ease;
    
    /* Navigation specific - Yan Holtz exact colors */
    --nav-text: black; /* Black for nav items - exact Yan Holtz */
    --nav-active: #69b3a2; /* Yan Holtz green for active state */
    --nav-hover: #69b3a2; /* Same green for hover */
    --nav-brand-hover: #251667; /* Dark purple for brand hover */
    --nav-bg: rgba(255, 255, 255, 0.95); /* Semi-transparent white */
    --nav-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    --mint:#4f7c74;
}
.logo-circle{
  width:80px;
  height:80px;
  border:3px solid var(--mint);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  font-size:1.25rem;
  margin:0 auto 1rem;
  color:var(--mint);
}
.yan-name{
  font-size: 3rem;
  text-transform: uppercase;
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--text-primary);
}
.yan-name span{display:block; color: var(--text-secondary);}
.hero-divider{
  width:100px;
  height:3px;
  background:var(--mint);
  border:none;
  margin:1.5rem auto;
}
.social-row{
  display:flex;
  gap:1.5rem;
  justify-content:center;
  font-size:1.5rem;
  margin-bottom:1.5rem;
}
.social-row a{color:var(--text-primary);text-decoration:none;}
.social-row a:hover{color:var(--mint);}
.hero-tagline{max-width:720px;margin:0 auto 2rem;font-size:1.125rem;line-height:1.8;}
.btn-outline.mint{
  border:2px solid var(--mint);
  color:var(--mint);
  background:transparent;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.8rem 2rem;
}
.btn-outline.mint:hover{background:var(--mint);color:#fff;}
/* nav centre */
.main-nav {
    width: 100%;
}
.main-nav .nav-menu{
    justify-content: center;
    margin:0 auto;
    gap:2rem;
}
.main-nav .nav-menu a{color:var(--text-primary);font-weight:500;}
.main-nav .nav-menu a:hover{color:var(--mint);}

.header-inner {
    justify-content: center;
}

/* ===========================
   CUSTOM NAVIGATION BASED ON YAN HOLTZ
   =========================== */

#mainNav {
  background-color: white;
}

#mainNav .navbar-toggler {
  font-size: 12px;
  right: 0;
  padding: 13px;
  text-transform: uppercase;
  color: white;
  border: 0;
  background-color: #00b8d4;
  font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* HOME brand styling - separate from main navigation */
#mainNav .navbar-brand-container {
  display: flex !important;
  align-items: center !important;
}

#mainNav .navbar-brand {
  color: #333 !important;
  font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
  font-size: 90% !important;
  font-weight: 400 !important;
  padding: 0.75em 1em !important;
  letter-spacing: 1px !important;
  text-transform: uppercase !important;
  transition: all 0.3s ease !important;
  text-decoration: none !important;
  border: none !important;
  box-shadow: none !important;
  background: transparent !important;
  white-space: nowrap !important;
  line-height: 1 !important;
}

#mainNav .navbar-brand:hover,
#mainNav .navbar-brand:focus,
#mainNav .navbar-brand:active {
  color: #00b8d4 !important;
  background-color: transparent !important;
  text-decoration: none !important;
}

/* Right-side navigation menu items */
#mainNav .navbar-nav {
  display: flex !important;
  align-items: baseline !important;
}

#mainNav .navbar-nav .nav-item {
  display: flex !important;
  align-items: baseline !important;
}

#mainNav .navbar-nav .nav-link {
  color: #333 !important;
  font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
  font-size: 90% !important;
  font-weight: 400 !important;
  padding: 0.75em 1em !important;
  letter-spacing: 1px !important;
  text-transform: uppercase !important;
  transition: all 0.3s ease !important;
  text-decoration: none !important;
  border: none !important;
  box-shadow: none !important;
  background: transparent !important;
  white-space: nowrap !important;
  line-height: 1 !important;
  vertical-align: baseline !important;
}

#mainNav .navbar-nav .nav-link:hover,
#mainNav .navbar-nav .nav-link:focus,
#mainNav .navbar-nav .nav-link:active {
  color: #00b8d4 !important;
  background-color: transparent !important;
  text-decoration: none !important;
}

/* Dropdown menu styling */
#mainNav .dropdown-menu {
  background-color: white !important;
  border: 1px solid #eee !important;
  border-radius: 4px !important;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1) !important;
  min-width: 160px !important;
  padding: 0.5rem 0 !important;
}

#mainNav .dropdown-item {
  color: #333 !important;
  font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
  font-size: 85% !important;
  font-weight: 400 !important;
  text-transform: uppercase !important;
  letter-spacing: 1px !important;
  padding: 0.5rem 1rem !important;
  transition: all 0.3s ease !important;
}

#mainNav .dropdown-item:hover,
#mainNav .dropdown-item:focus {
  background-color: #f8f9fa !important;
  color: #00b8d4 !important;
}

/* Simple HOME brand styling */

/* Keep dropdown arrow for other navigation items */
#mainNav .navbar-nav .dropdown-toggle::after {
  margin-left: 0.5em !important;
  font-size: 0.7em !important;
}

/* Navigation menu items styling */
#mainNav .navbar-nav .nav-item .nav-link {
  font-size: 90% !important;
  font-weight: 400 !important;
  padding: 0.75em 1em !important;
  letter-spacing: 1px !important;
  color: #333 !important;
  font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
  text-transform: uppercase !important;
  transition: all 0.3s ease !important;
  text-decoration: none !important;
  border: none !important;
  box-shadow: none !important;
  background: transparent !important;
  white-space: nowrap !important;
}

#mainNav .navbar-nav .nav-item .nav-link:hover,
#mainNav .navbar-nav .nav-item .nav-link:focus,
#mainNav .navbar-nav .nav-item .nav-link.active {
  color: #00b8d4 !important;
  background-color: transparent !important;
  text-decoration: none !important;
  border: none !important;
  box-shadow: none !important;
}

/* Desktop navigation layout */
@media (min-width: 992px) {
  #mainNav {
    padding-top: 25px;
    padding-bottom: 25px;
    -webkit-transition: padding-top 0.3s, padding-bottom 0.3s;
    -moz-transition: padding-top 0.3s, padding-bottom 0.3s;
    transition: padding-top 0.3s, padding-bottom 0.3s;
    background-color: transparent;
  }
  
  /* Desktop navigation layout - HOME left, menu right */
  #mainNav .container {
    display: flex !important;
    justify-content: space-between !important;
    align-items: baseline !important;
    height: auto !important;
  }
  
  #mainNav .navbar-brand-container {
    flex: 0 0 auto !important;
  }
  
  #mainNav .navbar-brand {
    padding: 1.1em 1.5em !important;
    margin: 0 !important;
  }
  
  #mainNav .navbar-nav {
    margin: 0 !important;
    display: flex !important;
    align-items: baseline !important;
    height: auto !important;
  }
  
  #mainNav .navbar-nav .nav-item {
    display: flex !important;
    align-items: baseline !important;
    height: auto !important;
  }
  
  #mainNav .navbar-nav .nav-link {
    display: flex !important;
    align-items: baseline !important;
    padding: 1.1em 1.5em !important;
    margin: 0 0.2em !important;
    height: auto !important;
    line-height: 1 !important;
    white-space: nowrap !important;
    vertical-align: baseline !important;
  }
  
  #mainNav.navbar-shrink {
    padding-top: 0;
    padding-bottom: 0;
    background-color: white;
  }
  
  #mainNav.navbar-shrink .navbar-brand {
    padding: 1.1em 1.5em !important;
    margin: 0 0.2em !important;
    line-height: 1 !important;
  }
}

/* ===========================
   YAN HOLTZ ENHANCED HERO SECTION
   =========================== */

/* Hero Section - Masthead */
header.masthead {
    position: relative;
    width: 100%;
    min-height: 100vh;
    text-align: center;
    color: black;
    background-color: white;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Particles.js background */
header.masthead #particles-js {
    position: absolute !important;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Hero content container */
header.masthead .intro-text {
    position: relative;
    z-index: 2;
    padding: 150px 0;
    max-width: 800px;
    margin: 0 auto;
}

/* Lead-in text (small intro) */
header.masthead .intro-text .intro-lead-in {
    font-size: 16px;
    font-style: italic;
    font-weight: 400;
    line-height: 1.5;
    margin-bottom: 25px;
    color: #666;
    font-family: "Droid Serif", "Helvetica Neue", Helvetica, Arial, serif;
}

/* Main heading (name with logo) */
header.masthead .intro-text .intro-heading {
    font-size: 50px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 25px;
    color: black;
    font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif;
    text-transform: uppercase;
    letter-spacing: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

/* Logo in heading */
header.masthead .intro-text .intro-heading .hero-logo {
    width: 60px;
    height: auto;
    margin: 0 10px;
}

/* Subheading (tagline/role) */
header.masthead .intro-text .intro-subheading {
    font-size: 18px;
    font-weight: 400;
    line-height: 1.4;
    margin-bottom: 40px;
    color: #69b3a2;
    font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Hero buttons container */
header.masthead .hero-buttons {
    margin-bottom: 40px;
}

header.masthead .hero-buttons .btn {
    margin: 10px 15px;
    padding: 15px 30px;
    font-size: 16px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 3px;
    transition: all 0.3s ease;
    text-decoration: none;
}

/* Primary button styling (Contact) */
.btn-primary {
    background-color: transparent;
    border: 2px solid #69b3a2;
    color: #69b3a2;
}

.btn-primary:hover {
    background-color: #69b3a2;
    color: white;
}

/* Secondary button styling (Portfolio) */
.btn-secondary {
    background-color: transparent;
    border: 1px solid #69b3a2;
    color: #69b3a2;
}

.btn-secondary:hover {
    background-color: #69b3a2;
    color: white;
}

/* Social links */
header.masthead .social-links {
    margin-top: 30px;
}

ul.social-buttons {
    margin-bottom: 0;
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 15px;
}

ul.social-buttons li a {
    display: inline-block;
    width: 45px;
    height: 45px;
    line-height: 45px;
    color: var(--social-border-color, #69b3a2);
    border: 2px solid var(--social-border-color, #69b3a2);
    background-color: var(--social-bg-color, transparent);
    border-radius: 50%;
    font-size: 18px;
    transition: all 0.3s ease;
    text-decoration: none;
}

ul.social-buttons li a:hover {
    background-color: var(--social-hover-bg-color, #69b3a2);
    color: var(--social-hover-icon-color, white);
    transform: translateY(-3px);
}

/* Scroll arrow */
header.masthead .scroll-arrow {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

header.masthead .scroll-arrow a {
    display: inline-block;
    color: #69b3a2;
    font-size: 30px;
    animation: bounce 2s infinite;
    text-decoration: none;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* ===========================
   RESPONSIVE NAVIGATION 
   =========================== */

/* Mobile and Tablet Navigation (below 992px) - Unified approach for WordPress customizer */
@media (max-width: 991px) {
    #mainNav {
        padding-top: 10px !important;
        padding-bottom: 10px !important;
        background-color: white !important;
    }
    
    /* Fix container layout to prevent menu button movement */
    #mainNav .container {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        position: relative !important;
    }
    
    #mainNav .navbar-brand-container {
        flex: 0 0 auto !important;
        position: relative !important;
    }
    
    #mainNav .navbar-brand {
        font-size: 80% !important;
        padding: 0.5em 0.8em !important;
        margin: 0 !important;
    }
    
    /* Fix menu button position */
    #mainNav .navbar-toggler {
        font-size: 10px !important;
        padding: 8px 10px !important;
        border-radius: 3px !important;
        position: relative !important;
        margin-left: auto !important;
        flex: 0 0 auto !important;
    }
    
    /* Collapse menu aligned with HOME navigation item */
    #mainNav .navbar-collapse {
        position: absolute !important;
        top: 100% !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        background-color: white !important;
        border-top: 1px solid #eee !important;
        margin-top: 0 !important;
        padding: 0 !important;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1) !important;
        z-index: 1000 !important;
        transition: none !important;
        transform: none !important;
    }
    
    /* Override Bootstrap collapse behavior */
    #mainNav .navbar-collapse.collapse:not(.show) {
        display: none !important;
    }
    
    #mainNav .navbar-collapse.show {
        display: block !important;
    }
    
    #mainNav .navbar-nav {
        text-align: left !important;
        width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
        list-style: none !important;
    }
    
    #mainNav .navbar-nav .nav-item {
        margin: 0 !important;
        width: 100% !important;
        display: block !important;
    }
    
    /* Align navigation items with HOME's text position */
    #mainNav .navbar-nav .nav-item .nav-link {
        font-size: 80% !important;
        font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
        font-weight: 400 !important;
        letter-spacing: 1px !important;
        text-transform: uppercase !important;
        color: #333 !important;
        padding: 0.75em 0 !important;
        margin: 0 !important;
        border-bottom: 1px solid #f5f5f5 !important;
        display: block !important;
        text-align: left !important;
        width: 100% !important;
        text-decoration: none !important;
        background: transparent !important;
        line-height: 1 !important;
        /* Precise alignment with HOME's first letter - match HOME's padding-left */
        padding-left: 0.8em !important;
    }
    
    #mainNav .navbar-nav .nav-item:last-child .nav-link {
        border-bottom: none !important;
    }
    
    /* First navigation item (should align perfectly with HOME) */
    #mainNav .navbar-nav .nav-item:first-child .nav-link {
        padding-top: 1em !important;
    }
    
    #mainNav .navbar-nav .nav-item:last-child .nav-link {
        padding-bottom: 1em !important;
    }
    
    #mainNav .navbar-nav .nav-item .nav-link:hover,
    #mainNav .navbar-nav .nav-item .nav-link.active {
        background-color: #f8f9fa !important;
        border-bottom: 2px solid #00b8d4 !important;
    }
    
    /* Touch-friendly mobile navigation */
    #mainNav .navbar-nav .nav-item .nav-link {
        -webkit-tap-highlight-color: transparent !important;
        touch-action: manipulation !important;
        user-select: none !important;
    }
    
    /* Touch active state for better mobile interaction */
    #mainNav .navbar-nav .nav-item .nav-link.touch-active {
        background-color: #e9f4ff !important;
        color: #00b8d4 !important;
    }
    
    /* Improve hamburger menu for touch */
    #mainNav .navbar-toggler:focus {
        outline: none !important;
        box-shadow: 0 0 0 2px rgba(0, 184, 212, 0.3) !important;
    }
    
    /* Mobile dropdown styling */
    #mainNav .dropdown-menu {
        position: static !important;
        float: none !important;
        width: auto !important;
        margin-top: 0 !important;
        background-color: #f8f9fa !important;
        border: none !important;
        box-shadow: none !important;
        border-radius: 0 !important;
    }
    
    #mainNav .dropdown-item {
        padding: 8px 20px !important;
        font-size: 75% !important;
    }
}

/* Small Mobile Navigation (below 480px) */
@media (max-width: 479px) {
    #mainNav .navbar-brand {
        font-size: 75% !important;
        padding: 0.4em 0.6em !important;
    }
    
    #mainNav .navbar-nav .nav-item .nav-link {
        font-size: 75% !important;
        padding: 10px 15px !important;
    }
}

/* Hero Section Responsive Design */
@media (max-width: 768px) {
    header.masthead .intro-text {
        padding: 100px 20px;
    }
    
    header.masthead .intro-text .intro-heading {
        font-size: 36px;
        flex-direction: column;
        gap: 10px;
    }
    
    header.masthead .intro-text .intro-heading .hero-logo {
        width: 50px;
    }
    
    header.masthead .intro-text .intro-subheading {
        font-size: 16px;
    }
    
    header.masthead .hero-buttons .btn {
        display: block;
        width: 100%;
        margin: 10px 0;
        max-width: 280px;
        margin-left: auto;
        margin-right: auto;
    }
    
    ul.social-buttons {
        flex-wrap: wrap;
        gap: 10px;
    }
}

/* Global Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-white);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

strong {
    font-weight: 600;
}

/* CONFLICTING STYLES REMOVED - Using Yan Holtz styles above */

/* DUPLICATE MEDIA QUERY REMOVED - Using main one above */

.navbar-toggler {
    padding: 0.25rem 0.75rem;
    font-size: 1.25rem;
    line-height: 1;
    background-color: transparent;
    border: 1px solid transparent;
    border-radius: 0.25rem;
    color: white;
}

.navbar-toggler:focus {
    outline: none;
}

/* DUPLICATE NAVBAR-TOGGLER REMOVED - Using main one above */

.ml-auto {
    margin-left: auto !important;
}

.navbar-expand-lg .navbar-collapse {
    display: flex !important;
    flex-basis: auto;
}

.collapse:not(.show) {
    display: none;
}

.navbar-nav {
    display: flex;
    flex-direction: column;
    padding-left: 0;
    margin-bottom: 0;
    list-style: none;
}

@media (min-width: 992px) {
    .navbar-expand-lg .navbar-nav {
        flex-direction: row;
    }
    
    .navbar-expand-lg .navbar-nav .nav-link {
        padding-right: 0.5rem;
        padding-left: 0.5rem;
    }
}

.fixed-top {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1030;
}

/* Hero Section - Yan Holtz Style */
.masthead {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.textlanding {
    color: black;
    position: absolute;
    top: 50%;
    right: 50%;
    transform: translate(50%, -50%);
    max-width: 600px;
    padding: 2em 3em;
    text-align: center;
    z-index: 2;
}

.textlanding p {
    font-family: 'Montserrat', sans-serif;
    font-weight: 400;
    color: #333;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.textlanding b {
    font-weight: 600;
}

/* Social buttons */
.list-inline {
    padding-left: 0;
    list-style: none;
    margin-bottom: 2rem;
}

.list-inline-item {
    display: inline-block;
    padding-right: 0.5rem;
    padding-left: 0.5rem;
}

/* Home page social buttons - Yan Holtz style - Dynamic colors from Customizer */
.social-buttons a {
    display: inline-block;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--social-bg-color, #ffffff);
    color: var(--social-border-color, #212529);
    border: 2px solid var(--social-border-color, #212529);
    line-height: 36px;
    text-align: center;
    font-size: 20px;
    transition: all 0.3s;
    text-decoration: none;
}

.social-buttons a:hover,
.social-buttons a:focus,
.social-buttons a:active {
    background-color: var(--social-hover-bg-color, #212529);
    color: var(--social-hover-icon-color, #ffffff);
}

/* Experience section styles */
.experience-tile {
    transition: all 0.3s ease;
}

.experience-tile:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.highlight-pulse {
    animation: pulseHighlight 2s ease-out;
    border-color: #69b3a2 !important;
    box-shadow: 0 0 20px rgba(105, 179, 162, 0.3) !important;
}

@keyframes pulseHighlight {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 rgba(105, 179, 162, 0.7);
    }
    25% {
        transform: scale(1.02);
        box-shadow: 0 0 20px rgba(105, 179, 162, 0.5);
    }
    50% {
        transform: scale(1.01);
        box-shadow: 0 0 15px rgba(105, 179, 162, 0.3);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 rgba(105, 179, 162, 0);
    }
}

/* Interactive timeline dots styling */
.timeline-dot {
    transition: all 0.2s ease;
}

.timeline-dot:hover {
    filter: drop-shadow(0 0 8px rgba(105, 179, 162, 0.6));
}

/* Button styles */
.btn-primary {
    background-color: #69b3a2;
    border-color: #69b3a2;
    color: white;
    font-weight: 600;
    padding: 12px 30px;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 25px;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    margin: 0 10px;
}

.btn-primary:hover {
    background-color: #5a9a8a;
    border-color: #5a9a8a;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(105, 179, 162, 0.4);
}

.btn-xl {
    font-size: 14px;
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid #69b3a2;
    color: #69b3a2;
    font-weight: 600;
    padding: 10px 25px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 25px;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    margin: 5px;
    font-size: 13px;
}

.btn-secondary:hover {
    background-color: #69b3a2;
    color: white;
    transform: translateY(-2px);
}

.btn-l {
    padding: 8px 20px;
}

/* Description section */
#description {
    padding: 80px 0;
}

#description p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: #666;
}

#description b {
    color: #333;
    font-weight: 600;
}

#description a {
    color: #69b3a2;
    text-decoration: none;
}

#description a:hover {
    text-decoration: underline;
}

.bg-light {
    background-color: #f8f9fa;
}

.hide-if-small-screen {
    display: block;
}

@media (max-width: 991px) {
    .hide-if-small-screen {
        display: none;
    }
}

.col-lg-4, .col-lg-8, .col-lg-12 {
    padding-right: 15px;
    padding-left: 15px;
}

.text-md-left {
    text-align: left;
}

/* Arrow landing */
.arrowlanding {
    color: black;
    position: absolute;
    top: 98%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 600px;
    padding: 2em 3em;
    z-index: 2;
}

.arrowlanding a {
    text-decoration: none;
    display: inline-block;
    animation: bounce 2s infinite;
}

#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
    pointer-events: none;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-subscribe {
    background: var(--primary-color);
    color: white;
}

.btn-subscribe:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.2);
}

.btn-outline {
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.scroll-indicator {
    font-size: 2rem;
    color: var(--text-secondary);
    animation: bounce 2s infinite;
}

.profile-img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 1rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* About Section */
.about-section {
    padding: 5rem 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.about-links {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.link-item {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.link-item:hover {
    text-decoration: underline;
}

.experience-timeline {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 1rem;
    position: relative;
}

.timeline-item {
    display: grid;
    grid-template-columns: 60px 1fr 1fr;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.timeline-item:last-child {
    border-bottom: none;
}

.timeline-item .year {
    font-weight: 600;
    color: var(--primary-color);
}

.timeline-item .role {
    font-weight: 500;
}

.timeline-item .company {
    color: var(--text-secondary);
}

.timeline-arrow {
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 2px solid var(--border-color);
    text-align: center;
}

.timeline-arrow span {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.timeline-arrow .consultant {
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 0.5rem;
}

/* Services Section */
#services {
    padding: 80px 0;
    background-color: #fff;
}

.services-logo {
    margin: 15px;
    color: #69b3a2;
    font-size: 45px;
    padding: 30px;
    border-radius: 50%;
    border-color: black;
    border-width: 5px;
    border: solid;
}

.services-logo:hover {
    color: white;
    background-color: #69b3a2;
}

#services h4 {
    margin-top: 20px;
    margin-bottom: 15px;
    font-size: 1.5rem;
    color: #333;
}

#services p {
    color: #666;
    line-height: 1.6;
}

#services a {
    text-decoration: none;
    color: inherit;
}

.section-subheading {
    font-size: 16px;
    font-weight: 400;
    font-style: italic;
    margin-bottom: 50px;
    color: #6c757d;
}

.text-muted {
    color: #6c757d !important;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.25rem;
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-weight: 400;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 1rem;
    position: relative;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.expand-btn {
    position: absolute;
    top: 2rem;
    right: 2rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    background: var(--bg-white);
    color: var(--primary-color);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.expand-btn:hover {
    background: var(--primary-color);
    color: white;
}

.service-details {
    display: none;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.service-details h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.service-details ul {
    list-style: none;
}

.service-details li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.service-details li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* Newsletter Section */
.newsletter-section {
    padding: 5rem 0;
    background: var(--bg-white);
    text-align: center;
}

.newsletter-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.newsletter-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Portfolio Section */
#portfolio {
    padding: 80px 0;
}

.explanation_portfolio {
    font-size: 14px;
    margin: 20px;
}

.section-heading {
    font-size: 40px;
    margin-top: 0;
    margin-bottom: 15px;
    text-transform: uppercase;
}

#portfolio-button-container {
    margin: 30px 0;
}

#portfolio-button-container .btn {
    margin: 5px;
}

.portfolio-item {
    right: 0;
    margin: 0 0 15px;
}

.portfolio-item .portfolio-link {
    position: relative;
    display: block;
    max-width: 400px;
    margin: 0 auto;
    cursor: pointer;
}

.portfolio-item .portfolio-link .portfolio-hover {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    background: rgba(105, 179, 162, 0.9);
    transition: all ease 0.5s;
}

.portfolio-item .portfolio-link .portfolio-hover:hover {
    opacity: 1;
}

.portfolio-item .portfolio-link .portfolio-hover .portfolio-hover-content {
    position: absolute;
    top: 50%;
    width: 100%;
    text-align: center;
    transform: translateY(-50%);
    color: white;
}

.portfolio-item .portfolio-link .portfolio-hover .portfolio-hover-content p {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
}

.portfolio-item .portfolio-link .portfolio-hover .portfolio-hover-content hr {
    margin: 20px auto;
    width: 60px;
    height: 2px;
    background-color: white;
    border: none;
}

.portfolio-item img {
    width: 100%;
    height: auto;
}

@media (min-width: 768px) {
    .portfolio-item {
        margin: 0 0 30px;
    }
}

.portfolio-item.hide {
    display: none;
}

.portfolio-item.show {
    display: block;
}

.col-md-3, .col-sm-6, .col-lg-4, .col-lg-8, .col-lg-12 {
    position: relative;
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
}

@media (min-width: 576px) {
    .col-sm-6 {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

@media (min-width: 768px) {
    .col-md-3 {
        flex: 0 0 25%;
        max-width: 25%;
    }
}

@media (min-width: 992px) {
    .col-lg-4 {
        flex: 0 0 33.333333%;
        max-width: 33.333333%;
    }
    .col-lg-8 {
        flex: 0 0 66.666667%;
        max-width: 66.666667%;
    }
    .col-lg-12 {
        flex: 0 0 100%;
        max-width: 100%;
    }
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -15px;
    margin-left: -15px;
}

.text-uppercase {
    text-transform: uppercase !important;
}

.img-fluid {
    max-width: 100%;
    height: auto;
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1.5rem;
    border: 1px solid var(--border-color);
    background: var(--bg-white);
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.portfolio-item {
    background: var(--bg-white);
    border-radius: 1rem;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.portfolio-image {
    height: 200px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-image {
    font-size: 4rem;
}

.portfolio-item h3 {
    padding: 1.5rem 1.5rem 0.5rem;
    font-size: 1.25rem;
}

.portfolio-item p {
    padding: 0 1.5rem 1rem;
    color: var(--text-secondary);
}

.portfolio-link {
    display: inline-block;
    padding: 0 1.5rem 1.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.portfolio-link:hover {
    text-decoration: underline;
}

/* Testimonials Section */
.testimonials-section {
    padding: 5rem 0;
    background: var(--bg-white);
}

.testimonials-wrapper {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.testimonial-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 1rem;
    border-left: 4px solid var(--primary-color);
}

.testimonial-card p {
    font-style: italic;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.testimonial-card cite {
    color: var(--text-primary);
    font-style: normal;
    font-weight: 500;
}

.testimonial-card em {
    color: var(--primary-color);
}

.navigation-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--primary-color);
    width: 24px;
    border-radius: 4px;
}

/* Contact Section */
.contact-section {
    padding: 5rem 0;
    background: var(--bg-light);
    text-align: center;
}

.contact-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.contact-section p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 3rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.contact-link:hover {
    color: var(--primary-color);
}

.contact-link .icon {
    font-size: 1.5rem;
}

/* Footer */
.site-footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.site-footer p {
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.social-links a {
    color: white;
    text-decoration: none;
    opacity: 0.7;
    transition: var(--transition);
}

.social-links a:hover {
    opacity: 1;
}

/* Animations */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Responsive Design */
/* DESKTOP - Ensure menu is visible */
@media (min-width: 992px) {
    .nav-menu {
        display: inline-block !important;
    }
    .menu-toggle {
        display: none !important;
    }
}

/* Tablet and Mobile Navigation */
@media (max-width: 991px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        padding: 1rem 0;
    }
    
    .nav-menu.active {
        display: block;
    }
    
    .nav-menu li {
        display: block;
        width: 100%;
        text-align: center;
        margin: 0;
    }
    
    .nav-menu a {
        display: block;
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
    
    .nav-menu a.active {
        background-color: rgba(0, 184, 212, 0.1);
    }
    
    .nav-menu a.active::after {
        display: none;
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-white);
        border-top: 1px solid var(--border-color);
        flex-direction: column;
        padding: 1rem 0;
        gap: 1rem;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .hero {
        padding: 7rem 0 3rem;
        min-height: 90vh;
    }
    
    .yan-name {
        font-size: 2.5rem;
    }
    
    .logo-circle {
        width: 60px;
        height: 60px;
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .btn-outline.mint {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .social-row {
        gap: 1rem;
        font-size: 1.25rem;
    }
    
    .hero-tagline {
        font-size: 1rem;
        padding: 0 1rem;
    }
    
    .hero-details {
        font-size: 0.9rem;
        padding: 0 1rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .site-header {
        padding: 0.75rem 0;
    }
}

    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-profile {
        order: -1;
    }
    
    .hero-name {
        font-size: 3rem;
    }
    
    .hero-separator {
        margin: 2rem auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .timeline-arrow {
        display: none;
    }
    
    .services-grid,
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-wrapper {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
}

/* AOS Animation Support */
[data-aos] {
    opacity: 0;
    transition-property: transform, opacity;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

/* Header scroll effect */
.site-header.scrolled {
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* Transition for header */
.site-header {
    transition: padding 0.3s ease, box-shadow 0.3s ease;
}

/* Additional hover effects */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left 0.3s ease;
}

.btn:hover::before {
    left: 100%;
}

/* Form focus effects */
input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Loading animation for future use */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
} 

/* Particles background */
#particles-js {
    width: 100%;
    height: 800px;
    background-color: white;
    background-image: url("");
    background-size: cover;
    background-position: 50% 50%;
    background-repeat: no-repeat;
}

/* override hero background to show particles */
.hero{
  background: transparent !important;
}

/* Remove the about-section background that blocks particles */
.about-section {
    background: transparent !important;
} 

/* let mouse reach particles */
.about-section, .about-section * {
  pointer-events: none;
}
.about-section .btn, .about-section a {
  pointer-events: auto;
}

/* Make hero section full viewport height and centered */
.hero {
  min-height: 100vh;
  padding: 0 0 6rem;
  display: flex;
  align-items: center;
}

.hero .container {
  grid-template-columns: 1fr;
  justify-items: center;
  text-align: center;
} 

/* Scroll arrow */
.scroll-indicator span{
  width: 40px;
  height: 40px;
  display: inline-block;
  border-left: 3px solid #4f7c74;
  border-bottom: 3px solid #4f7c74;
  transform: rotate(-45deg);
  transition: transform .3s;
}
.scroll-indicator a:hover span{
  transform: rotate(-45deg) translate(4px,4px);
}

.hero-profile img{
  border-radius:50%;
  width:120px;
  height:120px;
  object-fit:cover;
  margin-top:1.5rem;
}