/* Plan 1: Modern Single-Page Portfolio CSS */

/* ==========================================================================
   CSS Variables
   ========================================================================== */

:root {
    /* Colors */
    --color-bg-dark: #1b1f22;
    --color-bg-darker: #15181a;
    --color-bg-light: #242a2e;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b8c1cc;
    --color-accent: #58D5E5;
    --color-accent-bright: #6fe5f5;
    --color-accent-dim: #48b5c5;
    
    /* Tech Badge Colors */
    --badge-frontend: #61dafb;
    --badge-backend: #68d391;
    --badge-ai: #9f7aea;
    --badge-database: #f6ad55;
    --badge-other: #fc8181;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: 'Source Sans Pro', sans-serif;
    --font-size-base: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 3rem;
    --font-size-4xl: 4rem;
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--color-accent);
    margin: var(--spacing-sm) auto 0;
}

/* ==========================================================================
   Navigation
   ========================================================================== */

#nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(27, 31, 34, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
}

#nav.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

.logo {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

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

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: 300;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--color-text-primary);
    transition: var(--transition);
}

.scroll-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: var(--color-accent);
    width: 0;
    transition: width 0.1s ease;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

#hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--spacing-md);
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 1s ease-out 0.4s backwards;
}

.hero-tagline {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 1s ease-out 0.6s backwards;
}

.hero-cta {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-accent);
    color: var(--color-bg-dark);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    animation: fadeInUp 1s ease-out 0.8s backwards;
}

.hero-cta:hover {
    background: var(--color-accent-bright);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(88, 213, 229, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-text-primary);
    border-radius: 20px;
    position: relative;
}

.scroll-indicator span::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 2px;
    animation: scrollDown 2s infinite;
}

/* ==========================================================================
   Featured Projects Section
   ========================================================================== */

#featured {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-darker);
}

#featured .container {
    max-width: 1600px;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.featured-card {
    background: var(--color-bg-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    border: 2px solid transparent;
}

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

.featured-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 60px rgba(88, 213, 229, 0.4);
    border-color: var(--color-accent);
    background: rgba(36, 42, 46, 0.95);
}

.card-media {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    overflow: hidden;
    background: var(--color-bg-dark);
}

.card-media video,
.card-media img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.card-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    flex-grow: 1;
}

.card-content .view-details {
    margin-top: auto;
    width: 100%;
    text-align: center !important;
    display: block;
}

/* ==========================================================================
   Tech Badges
   ========================================================================== */

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition);
}

.badge.frontend {
    background: rgba(97, 218, 251, 0.2);
    color: var(--badge-frontend);
    border: 1px solid var(--badge-frontend);
}

.badge.backend {
    background: rgba(104, 211, 145, 0.2);
    color: var(--badge-backend);
    border: 1px solid var(--badge-backend);
}

.badge.ai {
    background: rgba(159, 122, 234, 0.2);
    color: var(--badge-ai);
    border: 1px solid var(--badge-ai);
}

.badge.database {
    background: rgba(246, 173, 85, 0.2);
    color: var(--badge-database);
    border: 1px solid var(--badge-database);
}

.badge.other {
    background: rgba(252, 129, 129, 0.2);
    color: var(--badge-other);
    border: 1px solid var(--badge-other);
}

.badge:hover {
    transform: translateY(-2px);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn-primary,
.btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 14px var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    text-align: center !important;
    line-height: 1.5;
    width: 100%;
    min-height: 48px;
}

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

.btn-primary:hover {
    background: var(--color-accent-bright);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(88, 213, 229, 0.3);
}

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

.btn-secondary:hover {
    background: var(--color-accent);
    color: var(--color-bg-dark);
}

/* ==========================================================================
   About Section
   ========================================================================== */

#about {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-dark);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about-image img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.about-content h2 {
    text-align: left;
}

.about-content h2::after {
    margin: var(--spacing-sm) 0;
}

.about-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: var(--spacing-lg) 0 var(--spacing-md);
    color: var(--color-accent);
}

.about-content h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.about-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.work-history {
    background: var(--color-bg-light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.work-dates {
    color: var(--color-accent);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.work-highlights {
    list-style: none;
    padding: 0;
    margin: var(--spacing-md) 0;
}

.work-highlights li {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    position: relative;
    color: var(--color-text-secondary);
}

.work-highlights li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* ==========================================================================
   Projects Carousel Section
   ========================================================================== */

#projects {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-darker);
}

.projects-carousel {
    position: relative;
    padding: calc(var(--spacing-md) + 20px) 0 var(--spacing-md) 0;
}

.project-card {
    background: var(--color-bg-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    min-height: 420px;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    border: 2px solid transparent;
    margin-top: 10px;
    margin-bottom: 10px;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(88, 213, 229, 0.3);
    border-color: var(--color-accent);
    background: rgba(36, 42, 46, 0.95);
}

.project-thumbnail {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--color-bg-dark);
    flex-shrink: 0;
}

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

.project-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-xs);
}

.project-card p {
    color: var(--color-text-secondary);
    padding: 0 var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
    flex-grow: 1;
}

.project-card .tech-badges {
    padding: 0 var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.project-card .badge {
    font-size: 0.75rem;
    padding: 2px 8px;
}

.project-card .btn-secondary {
    margin: auto var(--spacing-md) var(--spacing-md) var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
    width: auto;
    text-align: center;
}

/* Swiper Customization */
.swiper-button-prev,
.swiper-button-next {
    color: var(--color-accent);
}

.swiper-button-prev:hover,
.swiper-button-next:hover {
    color: var(--color-accent-bright);
}

.swiper-pagination-bullet {
    background: var(--color-text-secondary);
}

.swiper-pagination-bullet-active {
    background: var(--color-accent);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

#contact {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-dark);
}

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

.contact-info p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.social-links {
    list-style: none;
    padding: 0;
}

.social-links li {
    margin-bottom: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: var(--font-size-lg);
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--color-accent);
    transform: translateX(5px);
}

.social-links i {
    font-size: var(--font-size-xl);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--color-bg-light);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    transition: var(--transition);
}

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

#contact form #formspree-reset {
    margin-top: var(--spacing-sm);
}

#form-response {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    display: none;
}

#form-response.success {
    display: block;
    background: rgba(104, 211, 145, 0.2);
    color: var(--badge-backend);
    border: 1px solid var(--badge-backend);
}

#form-response.error {
    display: block;
    background: rgba(252, 129, 129, 0.2);
    color: var(--badge-other);
    border: 1px solid var(--badge-other);
}

/* ==========================================================================
   Footer
   ========================================================================== */

#footer {
    padding: var(--spacing-lg) 0;
    background: var(--color-bg-darker);
    text-align: center;
}

#footer p {
    color: var(--color-text-secondary);
    margin: 0;
}

#footer a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

#footer a:hover {
    color: var(--color-accent-bright);
}

/* ==========================================================================
   Modal
   ========================================================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    margin: auto;
    background: var(--color-bg-light);
    border-radius: var(--border-radius);
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    z-index: 2001;
    animation: modalSlideIn 0.3s ease;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--color-bg-dark);
    border: none;
    color: var(--color-text-primary);
    font-size: var(--font-size-2xl);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 2002;
}

.modal-close:hover {
    background: var(--color-accent);
    color: var(--color-bg-dark);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-body h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.modal-body video,
.modal-body img {
    width: 100%;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.modal-body p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.modal-body .tech-badges {
    margin: var(--spacing-md) 0;
}

.modal-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* ==========================================================================
   Animations
   ========================================================================== */

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scrollDown {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
}

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

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media screen and (max-width: 1024px) {
    .featured-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --font-size-4xl: 2.5rem;
        --font-size-3xl: 2rem;
        --font-size-2xl: 1.5rem;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-bg-dark);
        flex-direction: column;
        padding: var(--spacing-md);
        transform: translateY(-100%);
        transition: var(--transition);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }
    
    .nav-links.active {
        transform: translateY(0);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .modal-content {
        margin: var(--spacing-md);
        max-height: calc(100vh - 2 * var(--spacing-md));
    }
    
    /* Full-screen modal on mobile */
    .modal-content {
        width: 100%;
        max-width: 100%;
        height: 100vh;
        max-height: 100vh;
        margin: 0;
        border-radius: 0;
    }
}

@media screen and (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    #hero {
        min-height: 100svh;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero-tagline {
        font-size: var(--font-size-base);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}

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