/* CSS Variables for Theme Management */
:root {
    /* New Light/Dark Palette */
    --light-bg: #F8F7FB; /* soft lilac */
    --light-card: #FFFFFF;
    --light-text: #1A1A1A;
    --light-primary: #8B5CF6; /* purple */
    --light-secondary: #EC4899; /* pink */
    --light-highlight: #A78BFA; /* lavender */

    --dark-bg: #0F0F10; /* deep black */
    --dark-card: #1C1C1E;
    --dark-text: #F4F4F5;
    --dark-primary: #C084FC; /* neon purple */
    --dark-secondary: #F472B6; /* bright pink */
    --dark-highlight: #D946EF; /* electric magenta */

    /* Mapped semantic tokens — default to Light */
    --primary-color: var(--light-primary);
    --secondary-color: var(--light-secondary);
    --accent-color: var(--light-highlight);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;

    /* Background Colors */
    --bg-primary: var(--light-bg);
    --bg-secondary: #f0edf8;
    --bg-tertiary: #eae6f5;
    --bg-card: var(--light-card);

    /* Text Colors */
    --text-primary: var(--light-text);
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --text-inverse: #ffffff;

    /* Border & Shadow */
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Gradients (will be overridden by theme) */
    --gradient-primary: linear-gradient(135deg, var(--light-primary), var(--light-secondary));
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);

    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 5rem 0;
    --card-padding: 2rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-base: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;

    /* Bars */
    --bar-height: 64px;
}

/* Dark Theme mapping */
[data-theme="dark"] {
    --primary-color: var(--dark-primary);
    --secondary-color: var(--dark-secondary);
    --accent-color: var(--dark-highlight);

    --bg-primary: var(--dark-bg);
    --bg-secondary: #0f172a;
    --bg-tertiary: #0b1220;
    --bg-card: var(--dark-card);

    --text-primary: var(--dark-text);
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);

    --gradient-primary: linear-gradient(135deg, var(--dark-primary), var(--dark-secondary));
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Default icon color adapts to theme (brand utilities still override) */
i, .fa, .fas, .far, .fal, .fab {
    color: var(--text-primary);
    transition: color var(--transition-base);
}

/* Global floating decorative background */
.global-floating {
    position: fixed;
    inset: 0;
    z-index: 0; /* behind all content */
    overflow: hidden;
    pointer-events: none;
}

.global-floating .bubble {
    position: absolute;
    display: block;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    filter: blur(24px) saturate(120%);
    opacity: 0.22;
    animation: float-bubble 18s ease-in-out infinite;
    background: radial-gradient(closest-side, var(--primary-color), color-mix(in oklab, var(--secondary-color) 70%, transparent));
}

.global-floating .b1 { top: 6%; left: 5%; animation-delay: 0s; }
.global-floating .b2 { top: 18%; right: 10%; width: 180px; height: 180px; animation-delay: 2s; }
.global-floating .b3 { bottom: 14%; left: 12%; width: 260px; height: 260px; animation-delay: 4s; }
.global-floating .b4 { bottom: 8%; right: 8%; width: 210px; height: 210px; animation-delay: 6s; }
.global-floating .b5 { top: 42%; left: 38%; width: 160px; height: 160px; animation-delay: 8s; }
.global-floating .b6 { top: 28%; left: 72%; width: 140px; height: 140px; animation-delay: 10s; }
.global-floating .b7 { bottom: 36%; right: 28%; width: 320px; height: 320px; animation-delay: 12s; }
.global-floating .b8 { top: 56%; right: 48%; width: 150px; height: 150px; animation-delay: 14s; }
.global-floating .b9 { bottom: 52%; left: 6%; width: 190px; height: 190px; animation-delay: 16s; }
.global-floating .b10{ top: 8%; right: 38%; width: 130px; height: 130px; animation-delay: 18s; }

@keyframes float-bubble {
    0%, 100% { transform: translateY(0) translateX(0); }
    25% { transform: translateY(-16px) translateX(8px); }
    50% { transform: translateY(0) translateX(16px); }
    75% { transform: translateY(12px) translateX(-8px); }
}

/* Ensure main stacking context places content above background */
main, section, .container, .navbar, .footer { position: relative; z-index: 1; }

body {
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-inverse);
    box-shadow: 0 0 0 rgba(0,0,0,0);
}
.btn-primary:hover {
    box-shadow: 0 10px 20px -10px color-mix(in oklab, var(--primary-color) 60%, transparent 40%);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn:active { transform: translateY(0); }

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--text-inverse);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: var(--bg-tertiary);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    height: 100%;
}

.nav-logo a {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    font-style: italic;
    font-family: 'Dancing Script', cursive;
}

.nav-logo { display: flex; align-items: center; gap: 0.6rem; }
.brand-logo { display: block; filter: drop-shadow(0 2px 4px rgba(0,0,0,0.25)); }

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
}

/* Ensure the icon inside the theme toggle inherits the parent color */
.theme-toggle i {
    color: inherit;
}

.lang-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 2.5rem;
    margin-left: 0.5rem;
    border-radius: 0.5rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

.lang-toggle:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition-base);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 5rem;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.hero-shapes {
    position: relative;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    right: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    bottom: 20%;
    left: 5%;
    animation-delay: 2s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    top: 50%;
    left: 50%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: var(--font-size-lg);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1.25rem;
}

/* Socials embedded in hero */
.hero-socials { margin-top: 1.25rem; }
.hero-socials .socials-grid {
    display: flex;
    align-items: stretch;
    gap: 0.75rem;
    flex-wrap: nowrap; /* single line */
    overflow-x: auto; /* handle small screens gracefully */
    padding-bottom: 0.25rem; /* space for potential scrollbar */
}
.hero-socials .social-card {
    min-height: auto;
    padding: 0.25rem 0.25rem;
    background: transparent;
    border: 0;
    box-shadow: none;
}

/* Icons only in hero socials */
.hero-socials .social-info { display: none; }

/* =====================
   Modern animations
   ===================== */
/* Generic reveal animation (JS will toggle .show) */
.reveal {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
    transition: opacity 0.6s ease, transform 0.6s ease;
    will-change: opacity, transform;
}
.reveal.show { opacity: 1; transform: none; }

/* Subtle halo pulse around avatar */
@keyframes halo-pulse {
    0%, 100% {
        box-shadow:
            0 0 0 2px color-mix(in oklab, var(--primary-color) 60%, transparent),
            0 0 45px 8px color-mix(in oklab, var(--primary-color) 34%, transparent),
            0 0 120px 24px color-mix(in oklab, var(--secondary-color) 22%, transparent),
            0 10px 30px rgba(0,0,0,0.12);
    }
    50% {
        box-shadow:
            0 0 0 2px color-mix(in oklab, var(--primary-color) 65%, transparent),
            0 0 55px 10px color-mix(in oklab, var(--primary-color) 40%, transparent),
            0 0 140px 28px color-mix(in oklab, var(--secondary-color) 28%, transparent),
            0 14px 34px rgba(0,0,0,0.14);
    }
}
.image-container { animation: halo-pulse 6s ease-in-out infinite; }

/* Tilt-ready items (JS-enhanced) */
.tiltable {
    transform-style: preserve-3d;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    will-change: transform;
}
.tiltable .tilt-inner { transform: translateZ(20px); }

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
    .image-container { animation: none !important; }
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.image-container {
    width: 100%;
    max-width: 420px;
    position: relative;
    aspect-ratio: 1 / 1; /* keep it square */
    border-radius: 50%;
    overflow: hidden; /* crop image to circle */
    /* outer ring */
    border: 4px solid var(--bg-card);
    box-shadow:
        /* thin colored ring just outside the border */
        0 0 0 2px color-mix(in oklab, var(--primary-color) 60%, transparent),
        /* soft halo */
        0 0 45px 8px color-mix(in oklab, var(--primary-color) 40%, transparent),
        /* deeper glow */
        0 0 120px 24px color-mix(in oklab, var(--secondary-color) 28%, transparent),
        /* subtle elevation */
        0 10px 30px rgba(0,0,0,0.12);
}

.hero-avatar {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    border-radius: 50%;
    animation: avatar-float 6s ease-in-out infinite;
}

@keyframes avatar-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.floating-elements {
position: absolute;
width: 100%;
height: 100%;
}

.floating-icon {
position: absolute;
width: 60px;
height: 60px;
background: var(--bg-card);
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
font-size: 1.5rem;
color: var(--primary-color);
box-shadow: var(--shadow-lg);
animation: orbit 10s linear infinite;
animation-delay: var(--delay);
    animation: orbit 10s linear infinite;
    animation-delay: var(--delay);
}

@keyframes orbit {
    from { transform: rotate(0deg) translateX(180px) rotate(0deg); }
    to { transform: rotate(360deg) translateX(180px) rotate(-360deg); }
}

/* Section Styles */
section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: var(--font-size-4xl);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Socials Section */
.socials {
    background: var(--bg-secondary);
}

.socials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}

.social-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.25rem;
    min-height: 140px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.social-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: color-mix(in oklab, var(--primary-color) 35%, var(--border-color));
}

.social-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    color: var(--text-primary);
    font-size: 1.4rem;
}

.social-info h3 {
    margin: 0;
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
}

.social-info span { display: none; }

/* Brand color accents for social icons (official palettes) */
.social-icon.brand-linkedin { background: #0A66C2; border-color: #0A66C2; color: #ffffff; }
.social-icon.brand-github   { background: #24292e; border-color: #24292e; color: #ffffff; }
.social-icon.brand-kaggle   { background: #20BEFF; border-color: #20BEFF; color: #ffffff; }
.social-icon.brand-datacamp { background: #03EF62; border-color: #03EF62; color: #0b1b13; }
.social-icon.brand-x        { background: #000000; border-color: #000000; color: #ffffff; }
.social-icon.brand-twitter  { background: #1DA1F2; border-color: #1DA1F2; color: #ffffff; }

/* Ensure icon glyph inside brand badges inherits white/dark color */
.social-icon i { color: inherit; }

/* About Section */
.about {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    font-size: var(--font-size-lg);
    margin-bottom: 1.5rem;
}

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

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.about-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-card {
    background: rgba(255,255,255,0.6);
    padding: var(--card-padding);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.35);
}
[data-theme="dark"] .info-card {
    background: rgba(30,41,59,0.55);
    border-color: rgba(148,163,184,0.2);
}

.info-card h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.education-item {
    margin-bottom: 1.5rem;
}

.education-item h4 {
    font-size: var(--font-size-lg);
    margin-bottom: 0.5rem;
}

.education-item p {
    margin-bottom: 0.25rem;
}

.education-item span {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.contact-item i {
    color: var(--primary-color);
    width: 20px;
}

/* Skills Section */
.skills-content {
    max-width: 1000px;
    margin: 0 auto;
}

.skills-categories {
    display: grid;
    gap: 3rem;
    margin-bottom: 4rem;
}

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.skill-item {
    background: rgba(255,255,255,0.6);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform var(--transition-base);
    /* Apply featured-like styling to all skills */
    border: 2px solid var(--primary-color);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.10), transparent);
}
[data-theme="dark"] .skill-item {
    background: linear-gradient(135deg,
        color-mix(in oklab, var(--primary-color) 22%, transparent),
        rgba(30,41,59,0.45)
    );
}

.skill-item:hover {
    transform: translateY(-5px);
}

/* .skill-item.featured no longer needed since all skill items share the same style */

.skill-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
   
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-size: 1.5rem;
}
/* Scale inline SVG/img icons nicely inside the circular container */
.skill-icon img,
.skill-icon svg {
    max-width: 70%;
    max-height: 70%;
    display: block;
}

.skill-info {
    flex: 1;
}

.skill-info h4 {
    margin-bottom: 0.5rem;
}

.skill-level {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.skill-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    width: 0;
    transition: width 2s ease-in-out;
}

.skill-percentage {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 40px;
}

/* Certifications */
.certifications {
    background: rgba(255,255,255,0.6);
    padding: var(--card-padding);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.35);
}
[data-theme="dark"] .certifications { background: rgba(30,41,59,0.55); border-color: rgba(148,163,184,0.2); }

.certifications h3 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.cert-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    transition: transform var(--transition-base);
}

.cert-item:hover {
    transform: translateX(5px);
}

.cert-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Projects Section */
.projects {
    background: var(--bg-secondary);
}

/* Experience Timeline */
.experience {
    background: var(--bg-secondary);
}

/* Education section uses the same background/design as Experience */
.education {
    background: var(--bg-secondary);
}

.timeline {
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0 0 0 2rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 1rem;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-color), transparent 80%);
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
}

.timeline-marker {
    position: absolute;
    left: -0.1rem;
    top: 0.2rem;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--bg-card);
    border: 3px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.timeline-content {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative; /* anchor for bottom-right logos */
}
[data-theme="dark"] .timeline-content {
    background: rgba(30, 41, 59, 0.55);
}

.timeline-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.timeline-date {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.timeline-title {
    font-size: var(--font-size-lg);
}

.timeline-bullets {
    margin: 0.25rem 0 0 1rem;
    color: var(--text-secondary);
}

/* Bottom-right logos in Experience cards */
.timeline-logo {
    position: absolute;
    right: 0.75rem;
    bottom: 0.75rem;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.9);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.timeline-logo img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
    display: block;
}

[data-theme="dark"] .timeline-logo {
    background: rgba(30,41,59,0.75);
    border-color: rgba(148,163,184,0.2);
}

/* Skills badges in Experience */
.skill-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.6rem;
    border-radius: 999px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.badge i { font-size: 0.85rem; }

.badge.primary { background: rgba(37,99,235,0.12); color: #4567ae; border-color: rgba(37,99,235,0.25); }
.badge.success { background: rgba(16,185,129,0.12); color: #10b981; border-color: rgba(19, 183, 128, 0.25); }
.badge.warning { background: rgba(245,158,11,0.12); color: #bb975a; border-color: rgba(245,158,11,0.25); }
.badge.purple { background: rgba(124,58,237,0.12); color: #7c3aed; border-color: rgba(124,58,237,0.25); }
.badge.pink { background: rgba(236,72,153,0.12); color: #ec4899; border-color: rgba(236,72,153,0.25); }
.badge.slate { background: rgba(100,116,139,0.12); color: #daa1a1; border-color: rgba(196, 76, 65, 0.25); }

@media (max-width: 768px) {
    :root { --bar-height: 56px; }
    .timeline-header { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 768px) {
    .timeline {
        padding-left: 1.5rem;
    }
    .timeline::before {
        left: 0.75rem;
    }
    .timeline-marker {
        left: -0.35rem;
    }
}

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

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-card);
    color: var(--text-primary);
    border: none;
    border-radius: 2rem;
    cursor: pointer;
    transition: all var(--transition-base);
    font-weight: 500;
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.project-card {
    background: rgba(255,255,255,0.6);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}
[data-theme="dark"] .project-card { background: rgba(30,41,59,0.55); }

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    position: relative;
    height: 200px;
    background: var(--bg-tertiary);
    overflow: hidden;
}

/* Carousel */
.carousel {
    position: absolute;
    inset: 0;
}

.carousel .slide {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.carousel .slide.active {
    opacity: 1;
}

/* Carousels embedded in project-content */
.project-content .carousel {
    position: relative;
    inset: auto;
    height: 220px;
    border-radius: 0.5rem;
    overflow: hidden;
    background: var(--bg-tertiary);
    margin-bottom: 1rem;
}

.carousel-controls {
    position: absolute;
    bottom: 8px;
    right: 8px;
    display: flex;
    gap: 0.5rem;
    z-index: 2;
}

.carousel-prev,
.carousel-next {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(0,0,0,0.5);
    color: var(--text-primary);
    border: none;
    cursor: pointer;
    transition: background var(--transition-base), transform var(--transition-base);
}

.carousel-prev:hover,
.carousel-next:hover {
    background: rgba(0,0,0,0.7);
    transform: translateY(-1px);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
}

/* Brand color utilities for icons */
.brand-angular { color: #DD0031 !important; }
.brand-tableau-alt { color: #005F9E !important; }
.brand-sql { color: #1F6FEB !important; }
.brand-sqlserver { color: #A91D22 !important; }
.brand-python { color: #3776AB !important; }
.brand-js { color: #F7DF1E !important; }
.brand-html { color: #E34F26 !important; }
.brand-css { color: #1572B6 !important; }

.project-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.project-content {
    padding: var(--card-padding);
}

.project-header {
    margin-bottom: 1rem;
}

.project-header h3 {
    margin-bottom: 0.5rem;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 1rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.tag.primary {
    background: var(--primary-color);
    color: var(--text-inverse);
}

.project-description {
    margin-bottom: 1.5rem;
}

.project-kpis h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: var(--font-size-base);
}

.project-kpis ul {
    list-style: none;
    padding-left: 0;
}

.project-kpis li {
    padding: 0.25rem 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    position: relative;
    padding-left: 1rem;
}

.project-kpis li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(255,255,255,0.6);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    transition: transform var(--transition-base);
}
[data-theme="dark"] .contact-card { background: rgba(30,41,59,0.55); }

.contact-card:hover {
    transform: translateX(10px);
}

.contact-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.contact-details h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.contact-form-container {
    background: rgba(255,255,255,0.6);
    padding: var(--card-padding);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.35);
}
[data-theme="dark"] .contact-form-container { background: rgba(30,41,59,0.55); border-color: rgba(148,163,184,0.2); }

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color var(--transition-base);
}

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

/* Footer */
.footer {
    background: var(--bg-tertiary);
    padding: 0; /* unified height controlled by .footer-bar */
    text-align: center;
}

.footer-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    height: var(--bar-height);
    padding: 0 1rem;
    border-top: 1px solid var(--border-color);
}

.footer-copy {
    color: var(--text-secondary);
}

.footer-nav .footer-list {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    gap: 1rem 2rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-nav .footer-list a {
    color: var(--text-secondary);
    text-decoration: none;
    white-space: nowrap;
}

.footer-nav .footer-list a:hover { color: var(--primary-color); }

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: left;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.footer-col .footer-title {
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.footer-desc {
    color: var(--text-secondary);
}

.footer-list { list-style: none; padding: 0; margin: 0; }
.footer-list li { margin: 0.4rem 0; color: var(--text-secondary); }
.footer-list a { color: var(--text-secondary); text-decoration: none; }
.footer-list a:hover { color: var(--primary-color); }

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: 1rem;
    color: var(--text-muted);
}

/* Horizontal footer links row */
.footer-row { display: flex; justify-content: center; }
.footer-row .footer-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-row .footer-list li { margin: 0; }
.footer-row .footer-list a { color: var(--text-secondary); text-decoration: none; }
.footer-row .footer-list a:hover { color: var(--primary-color); }

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--bg-card);
    margin: 5% auto;
    padding: 0;
    border-radius: 1rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-body {
    padding: 1.5rem;
}

.close {
    color: var(--text-muted);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: color var(--transition-base);
}

.close:hover {
    color: var(--text-primary);
}

/* Lightbox (image preview) */
.lightbox {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.85);
    z-index: 2500;
    padding: 2rem;
}

.lightbox.open { display: flex; }

.lightbox-image {
    max-width: 95vw;
    max-height: 85vh;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-xl);
    object-fit: contain;
}

.lightbox-caption {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    background: rgba(0,0,0,0.4);
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    font-size: var(--font-size-sm);
}

.lightbox-btn {
    position: absolute;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.3);
    background: rgba(0,0,0,0.5);
    color: #fff;
    cursor: pointer;
    transition: transform var(--transition-base), background var(--transition-base);
}

.lightbox-btn:hover { background: rgba(0,0,0,0.7); transform: translateY(-1px); }

.lightbox-close { top: 1rem; right: 1rem; font-size: 1.5rem; }
.lightbox-prev { left: 1rem; }
.lightbox-next { right: 1rem; }

/* Brand/Icon Styles */
.icon-tableau {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    color: var(--primary-color); /* uses currentColor in SVG */
}

.floating-icon .icon-tableau {
    width: 24px;
    height: 24px;
}

.project-placeholder .icon-tableau {
    width: 48px;
    height: 48px;
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-card);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-stats {
        justify-content: center;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        justify-content: center;
        margin-top: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-grid { grid-template-columns: 1fr 1fr; }

    .footer-bar { flex-direction: column; gap: 0.75rem; }
    .footer-nav .footer-list { grid-auto-flow: row; grid-template-columns: repeat(3, max-content); justify-content: center; }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.5rem;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .project-filters {
        flex-direction: column;
        align-items: center;
    }

    .cert-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid { grid-template-columns: 1fr; }
    .footer-nav .footer-list { grid-template-columns: repeat(2, max-content); }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Header/Footer consistency overrides */
.navbar {
    height: var(--bar-height);
    background: var(--bg-tertiary);
    box-shadow: none;
    border-bottom: 1px solid var(--border-color);
}
.nav-container { height: 100%; }
.footer { background: var(--bg-tertiary); }
.footer-bar { height: var(--bar-height); }
@media (max-width: 768px) {
    .footer-bar { height: var(--bar-height); flex-direction: row; gap: 1rem; }
    .footer-nav .footer-list { grid-auto-flow: column; justify-content: end; }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 2rem; }

/* Screenshots Section */
.screenshots {
    background: var(--bg-secondary);
}

.screenshots-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.upload-form {
    background: var(--bg-card);
    padding: var(--card-padding);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
}

.upload-form .form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.upload-form select,
.upload-form input[type="file"],
.upload-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.upload-form .hint {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-muted);
}

.gallery .shot-section {
    margin-bottom: 2rem;
}

.gallery .shot-title {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.shot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.shot-card {
    background: var(--bg-card);
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
}

.shot-thumb { height: 150px; background: var(--bg-tertiary); }
.shot-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

.shot-meta { padding: 0.75rem; display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.shot-desc { color: var(--text-secondary); font-size: var(--font-size-sm); }

.btn-small { padding: 0.4rem 0.75rem; font-size: var(--font-size-sm); }

@media (max-width: 768px) {
    .screenshots-content { grid-template-columns: 1fr; }
}