/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Colors */
    --color-bg: #f8fafc;
    --color-bg-alt: #ffffff;
    --color-text: #0f172a;
    --color-text-muted: #64748b;
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-accent: #a855f7;
    --color-accent-light: #c084fc;
    --color-secondary: #06b6d4;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-glass: rgba(255, 255, 255, 0.7);
    --color-glass-border: rgba(255, 255, 255, 0.3);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --gradient-hero: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 50%, #fae8ff 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    --gradient-dark: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    
    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.16);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    --shadow-glow-lg: 0 0 60px rgba(99, 102, 241, 0.25);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 1px rgba(0, 0, 0, 0.08);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Selection styling */
::selection {
    background: var(--color-primary);
    color: white;
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

ul {
    list-style: none;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

@media (min-width: 768px) {
    h1 { font-size: 3.5rem; }
    h2 { font-size: 2.5rem; }
    h3 { font-size: 1.75rem; }
}

p {
    margin-bottom: 1rem;
}

.lead {
    font-size: 1.25rem;
    color: var(--color-text-muted);
}

/* ===================================
   Layout
   =================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    margin-bottom: var(--spacing-md);
    text-align: center;
    position: relative;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.section-title svg {
    flex-shrink: 0;
    color: var(--color-primary);
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background: var(--color-primary);
    margin: var(--spacing-xs) auto 0;
    border-radius: var(--radius-sm);
}

.subsection-title {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===================================
   Navigation
   =================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-links {
    display: none;
    align-items: center;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-text);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
}

.nav-resume {
    padding: 0.5rem 1.25rem;
    background: var(--gradient-primary);
    color: white !important;
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
    transition: all var(--transition-base);
}

.nav-resume:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    color: white !important;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-fast);
}

/* Mobile Menu */
.nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    gap: var(--spacing-md);
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.45);
    color: white;
}

.btn-secondary {
    background: white;
    color: var(--color-text);
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-small {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

.btn-full {
    width: 100%;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: auto;
    display: flex;
    align-items: center;
    padding: 80px 0 var(--spacing-md);
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    animation: float 15s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -20%;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(5deg); }
    66% { transform: translate(-20px, 20px) rotate(-5deg); }
}

.hero-content {
    max-width: 700px;
    position: relative;
    z-index: 1;
}

.hero-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    background: white;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.hero-label::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: 1.85rem;
    margin-bottom: var(--spacing-xs);
    line-height: 1.15;
    letter-spacing: -0.02em;
}

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

@media (min-width: 768px) {
    .hero-title {
        font-size: 2.75rem;
    }
}

.hero-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    max-width: 550px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.proof-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.proof-item {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    padding: 0.35rem 0.75rem;
    background: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-fast);
}

.proof-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
    color: var(--color-primary);
}

/* ===================================
   Featured Projects
   =================================== */
.featured-projects {
    padding: var(--spacing-lg) 0;
    background: white;
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.projects-grid.smaller {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.project-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
}

.project-card-link:hover {
    text-decoration: none;
}

.project-card-link .project-card {
    height: 100%;
}

.project-card {
    background: var(--gradient-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-slow);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    border-color: rgba(99, 102, 241, 0.3);
}

.project-card.featured {
    border: 2px solid rgba(99, 102, 241, 0.2);
    background: linear-gradient(145deg, #ffffff 0%, #f0f4ff 100%);
}

.project-card.featured::before {
    content: 'Featured';
    position: absolute;
    top: 1rem;
    right: -2rem;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.25rem 2.5rem;
    transform: rotate(45deg);
    z-index: 10;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-thumbnail {
    position: relative;
    height: 220px;
    background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 50%, #fae8ff 100%);
    overflow: hidden;
}

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

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

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.6) 0%, rgba(168, 85, 247, 0.6) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

.project-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.project-impact {
    font-size: 0.95rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.project-details {
    margin-bottom: var(--spacing-sm);
}

.project-details p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.tag {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.35rem 0.75rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    border: 1px solid rgba(99, 102, 241, 0.2);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.project-links {
    display: flex;
    gap: var(--spacing-sm);
}

.link {
    font-size: 0.875rem;
    font-weight: 500;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ===================================
   Impact Section
   =================================== */
.impact-section {
    padding: var(--spacing-lg) 0;
    background: var(--gradient-dark);
    color: white;
    position: relative;
    overflow: hidden;
}

.impact-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.impact-section .section-title {
    color: white;
    position: relative;
}

.impact-section .section-title::after {
    background: linear-gradient(90deg, var(--color-accent-light) 0%, var(--color-secondary) 100%);
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    text-align: center;
    position: relative;
}

.impact-item {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.impact-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
}

.impact-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, #fff 0%, #c7d2fe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.impact-label {
    font-size: 0.85rem;
    opacity: 0.85;
    font-weight: 500;
}

/* ===================================
   Skills Section
   =================================== */
.skills-section {
    padding: var(--spacing-lg) 0;
    background: white;
    position: relative;
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.skill-category {
    padding: var(--spacing-sm);
    background: var(--gradient-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(99, 102, 241, 0.2);
}

.skill-category h3 {
    font-size: 0.8rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.skill-list li:hover {
    padding-left: 0.5rem;
    color: var(--color-primary);
}

.skill-list li:last-child {
    border-bottom: none;
}

.skill-list strong {
    color: var(--color-text);
    font-weight: 600;
}

/* ===================================
   About Preview
   =================================== */
.about-preview {
    padding: var(--spacing-lg) 0;
    background: white;
}

.about-content {
    max-width: 700px;
    text-align: center;
    margin: 0 auto;
}

.about-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

/* ===================================
   Contact CTA
   =================================== */
.contact-cta {
    padding: var(--spacing-md) 0;
    background: var(--color-bg);
    text-align: center;
}

.contact-cta p {
    color: var(--color-text-muted);
    max-width: 500px;
    margin: 0 auto var(--spacing-sm);
    font-size: 0.9rem;
}

.contact-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.9rem;
}

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

.contact-item svg {
    color: var(--color-primary);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-sm) 0;
    background: var(--gradient-dark);
    color: white;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    text-align: center;
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-content p {
    margin: 0;
    font-size: 0.875rem;
    opacity: 0.7;
}

.footer-email {
    color: white;
    opacity: 0.9 !important;
    transition: opacity var(--transition-fast);
}

.footer-email:hover {
    opacity: 1 !important;
}

/* ===================================
   Page Header
   =================================== */
.page-header {
    padding: var(--spacing-xl) 0 var(--spacing-md);
    padding-top: calc(70px + var(--spacing-xl));
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 60%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
}

.page-header h1 {
    margin-bottom: var(--spacing-xs);
    position: relative;
    font-size: 2rem;
}

.page-header p {
    color: var(--color-text-muted);
    max-width: 600px;
    position: relative;
    font-size: 0.95rem;
}

/* ===================================
   Filter Section
   =================================== */
.filter-section {
    padding: var(--spacing-lg) 0;
    background: white;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 70px;
    z-index: 100;
}

.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.filter-chip {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.filter-chip:hover {
    border-color: var(--color-primary-light);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.filter-chip.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

/* ===================================
   Projects Page
   =================================== */
.projects-page {
    padding: var(--spacing-xl) 0 var(--spacing-3xl);
    background: var(--color-bg);
}

.projects-page .subsection-title {
    margin-top: var(--spacing-xl);
}

.projects-page .subsection-title:first-child {
    margin-top: 0;
}

/* ===================================
   Case Study
   =================================== */
.back-link {
    display: inline-flex;
    align-items: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

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

.case-study-header {
    padding: var(--spacing-lg) 0 var(--spacing-md);
    padding-top: calc(70px + var(--spacing-md));
    background: linear-gradient(135deg, var(--color-bg) 0%, #e0e7ff 100%);
}

.case-study-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    max-width: 600px;
}

.case-study-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.case-study-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.case-study-links .btn {
    white-space: nowrap;
}

/* Sidebar Table of Contents */
.sidebar-toc {
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-toc h3 {
    margin-top: 0 !important;
}

.toc-list {
    display: flex;
    flex-direction: column;
    list-style: none;
    gap: var(--spacing-xs);
    margin: 0;
    padding: 0;
    padding-left: 12px;
}

.toc-list li a {
    display: block;
    padding: 2px 0;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.toc-list li a:hover {
    color: var(--color-primary);
}

.toc-list li a.active {
    color: var(--color-primary);
    font-weight: 600;
    position: relative;
}

.toc-list li a.active::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
}

.case-study-content {
    padding: var(--spacing-md) 0 var(--spacing-lg);
    background: white;
}

.case-study-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 1024px) {
    .case-study-layout {
        grid-template-columns: 3fr 1fr;
    }
}

.case-section {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    scroll-margin-top: 100px;
}

.case-section:last-child {
    border-bottom: none;
}

.case-section h2 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.case-section h3 {
    font-size: 1rem;
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.case-section ul,
.case-section ol {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.case-section li {
    margin-bottom: 2px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.data-specs {
    background: var(--color-bg);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.spec-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: 2px 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.85rem;
}

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

.spec-label {
    font-weight: 600;
    min-width: 120px;
}

.spec-value {
    color: var(--color-text-muted);
}

/* Code Blocks */
pre {
    background: var(--color-text);
    color: #e2e8f0;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-size: 0.8rem;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

code {
    font-family: 'Consolas', 'Monaco', monospace;
}

/* Insight Cards */
.insight-card {
    background: var(--color-bg);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid var(--color-primary);
}

.insight-card h3 {
    font-size: 0.9rem;
    margin-top: 0;
}

.insight-visual {
    background: var(--color-border-light);
    border-radius: var(--radius-md);
    margin: var(--spacing-sm) 0;
    overflow: hidden;
}

.insight-visual img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    display: block;
}

.insight-visual.small {
    max-width: 400px;
}

.insight-visual p {
    padding: var(--spacing-sm);
    margin: 0;
    background: var(--color-border-light);
}

.insight-sowhat {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Recommendations */
.recommendation {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.rec-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--color-primary);
    color: white;
    font-weight: 700;
    font-size: 0.8rem;
    border-radius: 50%;
    flex-shrink: 0;
}

.rec-content h4 {
    margin-bottom: 2px;
    font-size: 0.9rem;
}

.rec-content p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 2px;
}

.rec-impact {
    font-weight: 500;
    color: var(--color-primary) !important;
}

/* Sidebar */
.case-study-sidebar {
    position: relative;
}

.kpi-card,
.sidebar-card {
    background: var(--gradient-card);
    padding: var(--spacing-sm);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-card);
}

.kpi-card.sticky,
.sidebar-card.sticky {
    position: sticky;
    top: calc(70px + var(--spacing-lg));
}

.kpi-card h3,
.sidebar-card h3 {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    font-weight: 700;
}

.kpi-card h3:first-child,
.sidebar-card h3:first-child {
    margin-top: 0;
}

.kpi-item {
    margin-bottom: var(--spacing-xs);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border-light);
}

.kpi-value {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.kpi-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.deliverables-list {
    list-style: none;
}

.deliverables-list li {
    margin-bottom: var(--spacing-xs);
}

.deliverables-list a {
    display: block;
    padding: var(--spacing-xs) 0;
    color: var(--color-text);
}

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

/* More Projects */
.more-projects {
    padding: var(--spacing-md) 0;
    background: var(--color-bg);
}

.more-projects h2 {
    margin-bottom: var(--spacing-lg);
}

/* ===================================
   About Page
   =================================== */
.about-page {
    padding: var(--spacing-md) 0;
    background: white;
}

.about-intro {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    align-items: start;
}

@media (min-width: 768px) {
    .about-intro {
        grid-template-columns: 200px 1fr;
    }
}

.about-photo {
    width: 160px;
    height: 160px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--gradient-primary);
    margin: 0 auto;
    padding: 3px;
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.about-photo-inner {
    width: 100%;
    height: 100%;
    border-radius: calc(var(--radius-xl) - 3px);
    overflow: hidden;
    background: white;
}

@media (min-width: 768px) {
    .about-photo {
        width: 180px;
        height: 180px;
    }
}

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

.about-text p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-xs);
}

.about-text p.lead {
    font-size: 1.05rem;
}

.about-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* Skills Detailed */
.about-skills {
    padding: var(--spacing-md) 0;
    background: var(--color-bg);
}

.skills-detailed {
    display: grid;
    gap: var(--spacing-md);
}

.skill-group h3 {
    font-size: 0.9rem;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-group h3 svg {
    flex-shrink: 0;
}

.skill-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-sm);
}

.skill-item {
    background: white;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.skill-item h4 {
    margin-bottom: 2px;
    color: var(--color-text);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.skill-item h4 svg {
    flex-shrink: 0;
    color: var(--color-primary);
}

.skill-item p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin: 0;
    line-height: 1.4;
}

/* How I Work */
.how-i-work {
    padding: var(--spacing-md) 0;
    background: white;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-sm);
}

.process-step {
    text-align: center;
    padding: var(--spacing-sm);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: white;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: var(--spacing-xs);
    box-shadow: 0 3px 10px rgba(99, 102, 241, 0.3);
}

.process-step h4 {
    font-size: 0.9rem;
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.process-step p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin: 0;
    line-height: 1.4;
}

/* Education Section */
.education-section {
    padding: var(--spacing-md) 0;
    background: var(--color-bg);
}

.edu-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .edu-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.edu-column h3 {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.edu-item,
.cert-item {
    background: white;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-xs);
}

.cert-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}

.cert-content {
    flex: 1;
}

.cert-link {
    color: var(--color-text-muted);
    transition: color 0.2s ease;
    flex-shrink: 0;
}

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

.edu-item h4,
.cert-item h4 {
    margin-bottom: 2px;
    font-size: 0.9rem;
}

.edu-school,
.cert-issuer {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin: 0;
}

.edu-date {
    font-size: 0.8rem;
    color: var(--color-primary);
    margin: 0;
}

.coursework-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2px;
    list-style: none;
}

.coursework-list li {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    padding: 2px 0;
}

/* ===================================
   Contact Page
   =================================== */
.contact-page {
    padding: var(--spacing-md) 0 var(--spacing-lg);
    background: white;
}

.contact-info-centered {
    max-width: 500px;
    margin: 0 auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.contact-form-wrapper h2,
.contact-info-wrapper h2 {
    margin-bottom: var(--spacing-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 500;
    font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 1rem 1.25rem;
    font-size: 1rem;
    font-family: var(--font-body);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: white;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-success {
    text-align: center;
    padding: var(--spacing-xl);
}

.form-success svg {
    color: #10b981;
    margin-bottom: var(--spacing-md);
}

.form-success h3 {
    margin-bottom: var(--spacing-sm);
}

.contact-info-wrapper h3 {
    font-size: 0.9rem;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.contact-info-item:hover {
    border-color: var(--color-primary);
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: white;
    border-radius: var(--radius-md);
    color: var(--color-primary);
}

.contact-details {
    display: flex;
    flex-direction: column;
}

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

.contact-value {
    font-weight: 500;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

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

.resume-download {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.resume-download h3 {
    margin-top: 0;
    font-size: 0.9rem;
}

.resume-download p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   Utilities
   =================================== */
.hidden {
    display: none !important;
}

@media (max-width: 767px) {
    .hide-mobile {
        display: none;
    }
}