/* ==========================================================================
   PORTFOLIO THEME CONFIG
   ==========================================================================
   HOW TO CUSTOMIZE:
   1. Change CSS variables under :root below to update colors, fonts, spacing
   2. Swap font stacks, adjust values, add new themes
   3. All sections use the variables automatically

   To switch to a light theme, set [data-theme="light"] variables
   To add a new theme, duplicate :root and change the [data-theme="..."] block
========================================================================== */
:root {
    /* === BRAND COLORS (Primary Accent) === */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;

    /* === THEME COLORS (Dark Theme Default) === */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --text-primary: #f1f1f4;
    --text-secondary: #a1a1aa;
    --border: rgba(255, 255, 255, 0.08);
    --white: #ffffff;
    --black: #000000;

    /* === FONTS === */
    --font-body: 'Inter', sans-serif;
    --font-heading: 'Space Grotesk', sans-serif;
    --font-size-base: 16px;
    --font-size-large: 20px;
    --font-size-xl: 32px;
    --font-size-2xl: 48px;

    /* === SPACING === */
    --section-padding: 100px;
    --container-max: 1200px;
    --border-radius: 12px;
    --border-radius-lg: 20px;

    /* === SHADOWS === */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);

    /* === TRANSITIONS === */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

[data-theme="light"] {
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --border: rgba(0, 0, 0, 0.08);
}

/* === RESET & BASE === */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: 1.7;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

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

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

/* === SECTIONS COMMON === */
.section {
    padding: var(--section-padding) 20px;
}

.section-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-title {
    font-size: var(--font-size-2xl);
    margin-bottom: 16px;
}

.section-description {
    color: var(--text-secondary);
    font-size: 18px;
}

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

/* === NAVBAR === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: background-color var(--transition-slow), padding var(--transition-slow), box-shadow var(--transition-slow);
}

.navbar.scrolled {
    background-color: var(--bg-primary);
    padding: 12px 0;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
}

.nav-logo span {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-base);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    transition: transform var(--transition-fast), background-color var(--transition-base);
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-base);
}

/* === BUTTONS === */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-full {
    width: 100%;
    text-align: center;
}

/* === HERO === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 20px 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
    opacity: 0.15;
}

.hero-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-title {
    font-size: var(--font-size-2xl);
    margin-bottom: 24px;
}

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

.hero-subtitle {
    font-size: var(--font-size-large);
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
}

.hero-image-placeholder,
.about-image-placeholder {
    width: 100%;
    aspect-ratio: 4/5;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.about-image-placeholder {
    aspect-ratio: 3/4;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.placeholder-label {
    color: var(--text-secondary);
    font-size: 14px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
    opacity: 0.2;
}

/* === ABOUT === */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h3 {
    font-size: var(--font-size-xl);
    margin-bottom: 20px;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 24px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    padding: 12px 16px;
    border-radius: var(--border-radius);
    font-size: 14px;
}

.feature-check {
    color: var(--primary);
    font-weight: 700;
}

/* === SERVICES === */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    padding: 40px 30px;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.service-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.service-list li {
    color: var(--text-secondary);
    font-size: 14px;
    padding-left: 20px;
    position: relative;
}

.service-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* === PROJECTS === */
.project-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    border-radius: 50px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-base);
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
}

.project-image {
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2), transparent 60%);
}

.project-image span {
    font-family: var(--font-heading);
    font-size: 18px;
    color: rgba(255,255,255,0.9);
}

.project-info {
    padding: 24px;
}

.project-info h3 {
    font-size: 22px;
    margin-bottom: 8px;
}

.project-info p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.project-tag {
    padding: 4px 12px;
    background: var(--bg-secondary);
    border-radius: 50px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* === TESTIMONIALS === */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 10px;
    right: 20px;
    font-family: var(--font-heading);
    font-size: 80px;
    color: var(--primary);
    opacity: 0.3;
}

.testimonial-text {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 24px;
    padding-top: 30px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
}

.testimonial-name {
    font-weight: 600;
}

.testimonial-role {
    font-size: 14px;
    color: var(--text-secondary);
}

/* === CONTACT === */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    padding: 50px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    font-size: 24px;
}

.contact-label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
}

.contact-item a,
.contact-item span {
    font-weight: 500;
}

.social-links {
    display: flex;
    gap: 16px;
    margin-top: 30px;
}

.social-links a {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 500;
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 16px;
    transition: border-color var(--transition-base);
    resize: vertical;
}

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

/* === FOOTER === */
.footer {
    padding: 40px 20px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-content {
    max-width: var(--container-max);
    margin: 0 auto;
}

.footer-brand {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
}

.footer-brand span {
    color: var(--primary);
}

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

/* === RESPONSIVE === */
@media (max-width: 992px) {
    .hero-container,
    .about-grid,
    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        order: -1;
    }

    .hero-image-placeholder {
        max-width: 400px;
        margin: 0 auto;
    }

    .contact-wrapper {
        padding: 40px 30px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 80px 20px;
    }

    .section-title {
        font-size: 32px;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        transform: translateY(-150%);
        transition: transform var(--transition-base);
        border-bottom: 1px solid var(--border);
    }

    .nav-menu.open {
        transform: translateY(0);
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
    }

    .contact-wrapper {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .hero-cta .btn {
        width: 100%;
        text-align: center;
    }

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

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

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    html {
        scroll-behavior: auto;
    }
}