/* ==========================================================================
   ASHA SURENDRAN - TECHNICAL PORTFOLIO STYLESHEET
   Author: Asha Surendran
   Specification: Modern, clean, fully responsive, dark/light theme support.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN SYSTEM & CSS CUSTOM VARIABLES
   -------------------------------------------------------------------------- */
:root {
    /* Color Palette (Light Theme Default) */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-alt: #f1f5f9;
    --bg-card: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.85);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-light: #94a3b8;

    --primary-color: #4f46e5;       /* Ocean Indigo */
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    
    --accent-color: #0d9488;        /* Teal Accent */
    --accent-hover: #0f766e;
    --accent-light: #ccfbf1;

    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;

    --card-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
    --card-shadow-hover: 0 20px 35px -10px rgba(79, 70, 229, 0.15), 0 10px 15px -5px rgba(15, 23, 42, 0.05);

    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.4);

    /* Fonts & Typography */
    --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-code: 'Fira Code', monospace;

    /* Transitions & Speeds */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Spacing & Layout */
    --nav-height: 80px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --radius-full: 9999px;
}

/* Dark Theme Overrides */
[data-theme="dark"] {
    --bg-primary: #090d16;
    --bg-secondary: #0f172a;
    --bg-alt: #131c2e;
    --bg-card: #1e293b;
    --bg-nav: rgba(15, 23, 42, 0.85);

    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-light: #64748b;

    --primary-color: #6366f1;       /* Vibrant Neon Indigo */
    --primary-hover: #818cf8;
    --primary-light: rgba(99, 102, 241, 0.15);

    --accent-color: #14b8a6;        /* Vibrant Teal */
    --accent-hover: #2dd4bf;
    --accent-light: rgba(20, 184, 166, 0.15);

    --border-color: #334155;
    --border-hover: #475569;

    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
    --card-shadow-hover: 0 20px 35px -10px rgba(99, 102, 241, 0.3);

    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
}

/* --------------------------------------------------------------------------
   2. GLOBAL RESETS & BASE STYLES
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button, input, textarea {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
}

button {
    cursor: pointer;
    background: none;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* --------------------------------------------------------------------------
   3. PRELOADER & SCROLL PROGRESS
   -------------------------------------------------------------------------- */
.preloader {
    position: fixed;
    inset: 0;
    background-color: var(--bg-primary);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.spinner-container {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

.loading-text {
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.dots {
    animation: blink 1.5s infinite;
}

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

@keyframes blink {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 1; }
}

.scroll-progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: transparent;
    z-index: 1001;
}

.scroll-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width 0.1s linear;
}

/* --------------------------------------------------------------------------
   4. NAVIGATION BAR
   -------------------------------------------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background-color: var(--bg-nav);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: 1280px;
    height: 100%;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-code);
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

.logo-bracket { color: var(--accent-color); }
.logo-name { color: var(--text-primary); }
.logo-slash { color: var(--primary-color); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-icon {
    font-size: 0.85rem;
    opacity: 0.8;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-alt);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
    transform: rotate(15deg);
}

.theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-dark { display: none; }
[data-theme="dark"] .theme-icon-light { display: inline-block; color: #fbbf24; }

.nav-cv-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
}

.mobile-toggle .bar {
    width: 100%;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 3px;
    transition: all var(--transition-fast);
}

.mobile-toggle.active .bar:nth-child(1) {
    transform: translateY(8.5px) rotate(45deg);
}
.mobile-toggle.active .bar:nth-child(2) {
    opacity: 0;
}
.mobile-toggle.active .bar:nth-child(3) {
    transform: translateY(-8.5px) rotate(-45deg);
}

.mobile-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* --------------------------------------------------------------------------
   5. BUTTONS & UI COMPONENTS
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.75rem 1.6rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
    background-color: var(--accent-color);
    color: #ffffff;
}

.btn-secondary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(13, 148, 136, 0.4);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: var(--primary-light);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.45rem 1rem;
    font-size: 0.85rem;
}

.btn-block {
    width: 100%;
}

/* Section Layout & Headers */
.section-padding {
    padding: 6rem 0;
}

.bg-alt {
    background-color: var(--bg-alt);
}

.section-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3.5rem;
}

.section-subtitle {
    font-family: var(--font-code);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.highlight-text {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 0 auto;
    border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------------
   6. HERO SECTION
   -------------------------------------------------------------------------- */
.hero-section {
    position: relative;
    padding-top: calc(var(--nav-height) + 4rem);
    padding-bottom: 4rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
}

.hero-bg-shapes .shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.25;
    z-index: 0;
    pointer-events: none;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    top: 10%;
    left: -100px;
}

.shape-2 {
    width: 350px;
    height: 350px;
    background: var(--accent-color);
    bottom: 20%;
    right: -50px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 1rem;
    background-color: var(--primary-light);
    border: 1px solid rgba(79, 70, 229, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: #10b981;
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.3);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    min-height: 2.2rem;
}

.typing-text {
    color: var(--accent-color);
    font-family: var(--font-code);
}

.cursor {
    display: inline-block;
    width: 2px;
    background-color: var(--accent-color);
    animation: blink 0.7s infinite;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 620px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero-tag {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 500;
}

.hero-tag i {
    color: var(--accent-color);
}

/* Profile Visual Card */
.hero-visual {
    display: flex;
    justify-content: center;
}

.profile-card-wrapper {
    position: relative;
    width: 100%;
    max-width: 380px;
}

.profile-card-glow {
    position: absolute;
    inset: -15px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-lg);
    filter: blur(20px);
    opacity: 0.35;
    z-index: 0;
}

.profile-card {
    position: relative;
    z-index: 1;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-normal);
}

.profile-card:hover {
    transform: translateY(-5px);
}

.profile-image-container {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 1 / 1;
    margin-bottom: 1.25rem;
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-badge {
    position: absolute;
    bottom: 12px;
    left: 12px;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    color: #ffffff;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.profile-card-footer {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
}

.info-pill {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background-color: var(--bg-alt);
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Stats Section */
.hero-stats-wrapper {
    margin-top: 4rem;
    position: relative;
    z-index: 1;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: var(--card-shadow-hover);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    background-color: var(--primary-light);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.stat-info {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.stat-plus, .stat-percent {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-color);
}

.stat-label {
    width: 100%;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 0.2rem;
}

/* --------------------------------------------------------------------------
   7. ABOUT SECTION
   -------------------------------------------------------------------------- */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3.5rem;
    align-items: start;
}

.about-bio-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--card-shadow);
}

.bio-heading {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.bio-text {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.7;

}

.about-details-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin: 2rem 0;
    padding: 1.5rem;
    background-color: var(--bg-alt);
    border-radius: var(--radius-md);
}

.detail-item {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    font-size: 0.9rem;
}

.detail-icon {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-top: 0.2rem;
}

.detail-item strong {
    display: block;
    color: var(--text-primary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-item span, .detail-item a {
    color: var(--text-secondary);
}

.about-action {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.about-pillars {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}

.pillar-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-fast);
}

.pillar-card:hover {
    transform: translateX(6px);
    border-color: var(--accent-color);
}

.pillar-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background-color: var(--accent-light);
    color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.pillar-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.pillar-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* --------------------------------------------------------------------------
   8. SKILLS SECTION
   -------------------------------------------------------------------------- */
.filter-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 3rem;
}

.filter-btn, .project-filter-btn {
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

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

.filter-btn.active, .project-filter-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.skills-column-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1.75rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-primary);
}

.skills-column-title i {
    color: var(--primary-color);
}

.skill-progress-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-fast);
}

.skill-progress-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.skill-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.6rem;
}

.skill-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-name i {
    color: var(--accent-color);
}

.skill-percentage {
    font-family: var(--font-code);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-color);
}

.progress-bar-bg {
    width: 100%;
    height: 8px;
    background-color: var(--bg-alt);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-full);
    transition: width 1.2s cubic-bezier(0.1, 0.5, 0.1, 1);
}

.skills-cards-wrapper {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.skill-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-fast);
}

.skill-box:hover {
    transform: translateY(-4px);
    border-color: var(--accent-color);
}

.skill-box-icon {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
}

.skill-box h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.skill-box p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* --------------------------------------------------------------------------
   9. EXPERIENCE & TIMELINE SECTION
   -------------------------------------------------------------------------- */
.timeline-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.timeline-heading {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-primary);
}

.timeline-heading i {
    color: var(--primary-color);
}

.timeline-column {
    position: relative;
}

.timeline-column::before {
    content: '';
    position: absolute;
    top: 3.5rem;
    bottom: 0;
    left: 15px;
    width: 2px;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 2.5rem;
}

.timeline-marker {
    position: absolute;
    left: 7px;
    top: 4px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 4px solid var(--bg-primary);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.timeline-marker.alt {
    background-color: var(--accent-color);
    box-shadow: 0 0 0 2px var(--accent-color);
}

.timeline-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-fast);
}

.timeline-content:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

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

.timeline-role {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.timeline-company {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-top: 0.2rem;
}

.timeline-badge {
    font-family: var(--font-code);
    font-size: 0.8rem;
    font-weight: 600;
    background-color: var(--primary-light);
    color: var(--primary-color);
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-full);
}

.timeline-badge.alt {
    background-color: var(--accent-light);
    color: var(--accent-color);
}

.timeline-list {
    margin-bottom: 1.25rem;
}

.timeline-list li {
    position: relative;
    padding-left: 1.2rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
    line-height: 1.6;
}

.timeline-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

.timeline-subinfo {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
}

.timeline-project-note {
    font-size: 0.9rem;
    color: var(--text-secondary);
    background-color: var(--bg-alt);
    padding: 0.8rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    border-left: 3px solid var(--accent-color);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    font-size: 0.75rem;
    font-weight: 600;
    background-color: var(--bg-alt);
    color: var(--text-muted);
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   10. PROJECTS SECTION
   -------------------------------------------------------------------------- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-fast);
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--card-shadow-hover);
    border-color: var(--primary-color);
}

.project-img-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background-color: var(--bg-alt);
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-img {
    transform: scale(1.05);
}

.project-category-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-full);
}

.project-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
    line-height: 1.3;
}

.project-subtitle {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 0.8rem;
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.5;
    flex-grow: 1;
}

.project-tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
}

.project-tech-stack span {
    font-family: var(--font-code);
    font-size: 0.75rem;
    background-color: var(--bg-alt);
    color: var(--text-muted);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
}

.project-footer {
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

/* --------------------------------------------------------------------------
   11. MODAL POPUPS
   -------------------------------------------------------------------------- */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(6px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.modal-backdrop.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1.25rem;
    font-size: 1.8rem;
    color: var(--text-muted);
    line-height: 1;
    transition: color var(--transition-fast);
}

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

.modal-header {
    padding: 2rem 2rem 1rem;

}

.modal-badge {
    font-family: var(--font-code);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.modal-title {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-top: 0.2rem;
}

.modal-body {
    padding: 0 2rem 1.5rem;
}

.modal-img {
    width: 100%;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    max-height: 300px;
    object-fit: cover;
}

.modal-details h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 1.25rem 0 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-details h4 i {
    color: var(--primary-color);
}

.modal-details p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-list {
    list-style: disc;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.modal-list li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.modal-footer {
    padding: 1rem 2rem 2rem;
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    border-top: 1px solid var(--border-color);
}

.cv-preview {
    background-color: var(--bg-alt);
    padding: 1.5rem;
    border-radius: var(--radius-md);
}

.cv-preview h3 { font-size: 1.4rem; margin-bottom: 0.2rem; }
.cv-preview .cv-tagline { color: var(--accent-color); font-weight: 600; margin-bottom: 1rem; }
.cv-preview hr { border: none; border-top: 1px solid var(--border-color); margin: 1rem 0; }
.cv-preview h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.cv-preview ul { padding-left: 1.2rem; list-style: disc; }
.cv-preview ul li { margin-bottom: 0.4rem; font-size: 0.9rem; }

/* --------------------------------------------------------------------------
   12. CONTACT SECTION
   -------------------------------------------------------------------------- */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3.5rem;
    align-items: start;
}

.contact-subtitle {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.contact-text {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.contact-cards-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.contact-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-fast);
}

.contact-card:hover {
    transform: translateX(6px);
    border-color: var(--primary-color);
}

.contact-card-icon {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-md);
    background-color: var(--primary-light);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-card-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 600;
}

.contact-card-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

a.contact-card-value:hover {
    color: var(--primary-color);
}

.availability-badge {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background-color: var(--accent-light);
    color: var(--accent-color);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
}

/* Contact Form */
.contact-form-wrapper {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--card-shadow);
}

.form-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.required { color: #ef4444; }

.input-with-icon {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.textarea-icon .input-icon {
    top: 1.2rem;
    transform: none;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.8rem;
    background-color: var(--bg-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-input:focus {
    border-color: var(--primary-color);
    background-color: var(--bg-card);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.error-msg {
    display: none;
    font-size: 0.75rem;
    color: #ef4444;
    margin-top: 0.3rem;
    font-weight: 500;
}

.form-group.has-error .error-msg {
    display: block;
}

.form-group.has-error .form-input {
    border-color: #ef4444;
}

.math-challenge-group .form-input {
    padding-left: 1rem;
}

.form-toast {
    margin-top: 1rem;
    padding: 0.8rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    display: none;
    text-align: center;
}

.form-toast.success {
    display: block;
    background-color: #dcfce7;
    color: #15803d;
    border: 1px solid #bbf7d0;
}

.form-toast.error {
    display: block;
    background-color: #fee2e2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

/* --------------------------------------------------------------------------
   13. FOOTER
   -------------------------------------------------------------------------- */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding-top: 4rem;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 1rem;
    max-width: 400px;
    line-height: 1.6;
}

.footer-links h4, .footer-social h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.footer-links ul li {
    margin-bottom: 0.6rem;
}

.footer-links ul li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links ul li a:hover {
    color: var(--primary-color);
}

.social-icons {
    display: flex;
    gap: 0.8rem;
}

.social-icons a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-alt);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #ffffff;
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-bottom-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* Back To Top Floating Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--bg-card);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 990;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.8);
    transition: all var(--transition-normal);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

.back-to-top:hover {
    background-color: var(--primary-color);
    color: #ffffff;
    transform: translateY(-4px);
}

.progress-ring {
    position: absolute;
    top: 0;
    left: 0;
    transform: rotate(-90deg);
    pointer-events: none;
}

.progress-ring-circle {
    stroke-dasharray: 125.6;
    stroke-dashoffset: 125.6;
    transition: stroke-dashoffset 0.1s linear;
}

/* --------------------------------------------------------------------------
   14. RESPONSIVE DESIGN (MOBILE & TABLET BREAKPOINTS)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-cta, .hero-tags {
        justify-content: center;
    }

    .hero-description {
        margin: 0 auto 2rem;
    }

    .profile-card-wrapper {
        margin: 0 auto;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid, .skills-grid, .timeline-wrapper, .contact-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: calc(100vh - var(--nav-height));
        background-color: var(--bg-card);
        flex-direction: column;
        align-items: flex-start;
        padding: 2rem;
        gap: 1rem;
        border-left: 1px solid var(--border-color);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
        transition: right var(--transition-normal);
        z-index: 999;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-link {
        width: 100%;
        padding: 0.75rem 1rem;
    }

    .mobile-toggle {
        display: flex;
    }

    .nav-cv-btn {
        display: none;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.15rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

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

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

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

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

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

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

@media (max-width: 480px) {
    .section-padding {
        padding: 4rem 0;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .profile-card-footer {
        flex-direction: column;
    }
}