/* ===================================
   CSS VARIABLES & RESET
   =================================== */

:root {
    /* Colors - Professional Dark Theme */
    --color-primary: #0a0e27;          /* Deep navy blue */
    --color-secondary: #1a1f3a;        /* Dark blue-gray */
    --color-accent: #6366f1;           /* Modern indigo */
    --color-accent-light: #818cf8;     /* Light indigo */
    --color-accent-dark: #4f46e5;      /* Dark indigo */
    --color-text: #e2e8f0;             /* Light gray text */
    --color-text-light: #94a3b8;       /* Muted gray */
    --color-background: #0f172a;       /* Very dark blue */
    --color-background-alt: #1e293b;   /* Dark blue-gray */
    --color-border: #334155;           /* Gray border */
    --color-card-bg: #1e293b;          /* Card background */
    
    /* Typography */
    --font-display: 'Playfair Display', serif;
    --font-body: 'DM Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ===================================
   UTILITIES
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-header {
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: 2rem;
}

.section-number {
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 900;
    color: var(--color-accent);
    line-height: 1;
    opacity: 0.3;
}

.section-title {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: transform var(--transition-base);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
}

.logo:hover {
    color: var(--color-accent);
}

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

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

.nav-links a:not(.btn-cv):after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}

.nav-links a:not(.btn-cv):hover:after {
    width: 100%;
}

.btn-cv {
    padding: 0.6rem 1.5rem;
    background-color: var(--color-accent);
    color: white;
    border-radius: 30px;
    transition: all var(--transition-base);
}

.btn-cv:hover {
    background-color: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-base);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

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

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.4) 0%, transparent 70%);
    top: -10%;
    right: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(129, 140, 248, 0.3) 0%, transparent 70%);
    bottom: -10%;
    left: -5%;
    animation-delay: 7s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.35) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-30px, 30px) scale(0.9); }
}

.hero-content {
    text-align: center;
    max-width: 900px;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 7rem);
    font-weight: 900;
    line-height: 0.9;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.title-line {
    display: block;
    animation: slideIn 0.8s ease-out backwards;
}

.title-line:nth-child(1) {
    animation-delay: 0.2s;
}

.title-line:nth-child(2) {
    animation-delay: 0.4s;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 2rem;
    animation: fadeIn 1s ease-out 0.6s backwards;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeIn 1s ease-out 0.8s backwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeIn 1s ease-out 1s backwards;
}

.btn-primary, .btn-secondary {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 30px;
    transition: all var(--transition-base);
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: var(--color-accent-light);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
    background-color: var(--color-accent);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.6;
    animation: fadeIn 1s ease-out 1.5s backwards;
}

.scroll-indicator span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-light);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background-color: var(--color-accent);
    animation: scrollAnimation 2s ease-in-out infinite;
}

@keyframes scrollAnimation {
    0%, 100% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); }
}

/* ===================================
   STATISTICS SECTION
   =================================== */

.stats-container {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 5rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(99, 102, 241, 0.3);
    animation: fadeIn 1s ease-out 1.2s backwards;
}

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

.stat-number {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 900;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 0.5rem;
    position: relative;
    display: inline-block;
}

.stat-number::after {
    content: '+';
    position: absolute;
    right: -1.5rem;
    top: 0;
    font-size: 3rem;
    opacity: 0.5;
}

.stat-item:first-child .stat-number::after {
    content: '';
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.4;
    font-weight: 500;
}

/* ===================================
   ABOUT SECTION
   =================================== */

.about {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-background);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image {
    position: relative;
}

.image-frame {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
}

.image-frame::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: 20px;
    bottom: 20px;
    border: 3px solid var(--color-accent);
    border-radius: 10px;
    z-index: -1;
}

.image-frame img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-slow);
}

.image-frame:hover img {
    transform: scale(1.05);
}

.about-content h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.about-content p {
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    line-height: 1.8;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.skill-item h4 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--color-accent);
}

.skill-item p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* ===================================
   PROJECTS SECTION
   =================================== */

.projects {
    padding: var(--spacing-xl) 0;
}

.projects-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.project-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.project-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card:nth-child(even) {
    direction: rtl;
}

.project-card:nth-child(even) .project-content {
    direction: ltr;
}

.project-image {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    aspect-ratio: 4/3;
}

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

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.95), rgba(79, 70, 229, 0.95));
    opacity: 0;
    transition: opacity var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.project-number {
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 900;
    color: white;
}

.project-content {
    padding: 2rem 0;
}

.project-title {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.project-description {
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-size: 1.05rem;
}

.project-tags {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.tag {
    padding: 0.4rem 1rem;
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.tag:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--color-accent);
    transition: gap var(--transition-base);
}

.project-link:hover {
    gap: 1rem;
}

/* ===================================
   CONTACT SECTION
   =================================== */

.contact {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-background);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.contact-info p {
    color: var(--color-text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--color-card-bg);
    border-radius: 10px;
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.contact-item:hover {
    transform: translateX(10px);
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

.contact-item svg {
    flex-shrink: 0;
}

.contact-form {
    background-color: var(--color-card-bg);
    padding: 3rem;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
    background-color: var(--color-background);
    color: var(--color-text);
}

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

.form-group textarea {
    resize: vertical;
}

.btn-submit {
    width: 100%;
    padding: 1rem 2rem;
    background-color: var(--color-accent);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-submit:hover {
    background-color: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    padding: 3rem 0;
    background-color: var(--color-secondary);
    color: var(--color-text);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 968px) {
    .section-number {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .project-card,
    .project-card:nth-child(even) {
        grid-template-columns: 1fr;
        direction: ltr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background-color: var(--color-secondary);
        flex-direction: column;
        padding: 2rem;
        transform: translateX(100%);
        transition: transform var(--transition-base);
        border-top: 1px solid var(--color-border);
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .stats-container {
        gap: 2rem;
        flex-wrap: wrap;
    }
    
    .stat-number {
        font-size: 3rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .nav-container {
        padding: 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .contact-form {
        padding: 2rem 1.5rem;
    }
}