/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root {
    --primary-color: #00bcd4;
    --secondary-color: #0097a7;
    --accent-color: #ff4081;
    --text-color: #333;
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --dark-primary: #1976d2;
    --dark-secondary: #0d47a1;
    --dark-accent: #1565c0;
    --dark-text: #ffffff;
    --dark-bg: #000000;
    --dark-card: #1a1a1a;
    --border-color: #ddd;
    --spinner-bg: #f3f3f3;
    --button-bg: #e0e0e0;
    --success-bg: #d4edda;
    --success-text: #155724;
    --error-bg: #f8d7da;
    --error-text: #721c24;
    --delete-bg: #dc3545;
    --delete-hover: #c82333;
    --success-color: #28a745;
    --error-color: #dc3545;
    --dark-border-color: #333;
    --dark-spinner-bg: #333;
    --dark-button-bg: #222;
    --dark-success-bg: #155724;
    --dark-success-text: #d4edda;
    --dark-success-color: #28a745;
    --dark-error-bg: #721c24;
    --dark-error-text: #f8d7da;
    --dark-error-color: #b02a37;
    --dark-delete-bg: #b02a37;
    --dark-delete-hover: #8b1e2a;
}

/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader-content {
    text-align: center;
}

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

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Back to Top */
#back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

#back-to-top.show {
    opacity: 1;
    visibility: visible;
}

#back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-5px);
}

/* Mascot */
#mascot {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    z-index: 9998;
    transition: transform 0.2s ease;
    font-size: 2rem;
}

.mascot-body {
    animation: bounce 2s infinite;
}

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

.speech-bubble {
    position: absolute;
    top: 50%;
    right: 120%;
    transform: translateY(-50%);
    background: var(--card-bg);
    color: var(--text-color);
    padding: 0.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    white-space: nowrap;
    font-size: 0.8rem;
    margin-right: 10px;
    max-width: 200px;
    word-wrap: break-word;
    white-space: normal;
}

.speech-bubble::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 100%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-left-color: var(--card-bg);
}

.speech-bubble.show {
    opacity: 1;
    visibility: visible;
}

[data-theme="dark"] {
    --primary-color: var(--dark-primary);
    --secondary-color: var(--dark-secondary);
    --accent-color: var(--dark-accent);
    --text-color: var(--dark-text);
    --bg-color: var(--dark-bg);
    --card-bg: var(--dark-card);
    --border-color: var(--dark-border-color);
    --spinner-bg: var(--dark-spinner-bg);
    --button-bg: var(--dark-button-bg);
    --success-bg: var(--dark-success-bg);
    --success-text: var(--dark-success-text);
    --error-bg: var(--dark-error-bg);
    --error-text: var(--dark-error-text);
    --delete-bg: var(--dark-delete-bg);
    --delete-hover: var(--dark-delete-hover);
    --success-color: var(--dark-success-color);
    --error-color: var(--dark-error-color);
}

[data-theme="dark"] body {
    background: linear-gradient(135deg, var(--bg-color) 0%, #0a0a0a 50%, var(--primary-color) 100%);
}

[data-theme="dark"] .home-page {
    background: linear-gradient(135deg, var(--bg-color) 0%, #0f0f0f 25%, var(--primary-color) 50%, #1a1a1a 75%, var(--accent-color) 100%);
}

[data-theme="dark"] .members-page {
    background: linear-gradient(45deg, var(--bg-color) 0%, #1a1a1a 50%, var(--primary-color) 100%);
}

[data-theme="dark"] .projects-page {
    background: linear-gradient(-45deg, var(--bg-color) 0%, #1a1a1a 50%, var(--secondary-color) 100%);
}

[data-theme="dark"] .previews-page {
    background: linear-gradient(90deg, var(--bg-color) 0%, #1a1a1a 50%, var(--accent-color) 100%);
}

[data-theme="dark"] header {
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, var(--dark-bg) 50%);
}

[data-theme="dark"] footer {
    background: var(--dark-bg);
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #000000 0%, #1976d2 100%);
}

* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, var(--bg-color) 0%, #e0f7fa 50%, var(--primary-color) 100%);
    background-size: 400% 400%;
    color: var(--text-color);
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
    opacity: 0;
    animation: fadeIn 1s ease-in-out 0.5s forwards, gradientShift 15s ease infinite;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="0.5" fill="rgba(255,255,255,0.03)"/><circle cx="75" cy="75" r="0.3" fill="rgba(255,255,255,0.02)"/><circle cx="50" cy="10" r="0.4" fill="rgba(0,188,212,0.02)"/><circle cx="90" cy="40" r="0.2" fill="rgba(255,100,129,0.02)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
    z-index: -1;
    animation: grainMove 20s linear infinite;
}

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

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 1rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease, transform 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 25px;
}

nav a:hover {
    color: var(--accent-color);
    transform: translateY(-2px);
    background-color: rgba(255, 255, 255, 0.1);
}

.theme-toggle, .lang-toggle {
    position: absolute;
    top: 1rem;
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform 0.3s ease;
    padding: 0.5rem;
    border-radius: 5px;
}

.theme-toggle {
    right: 1rem;
}

.lang-toggle {
    right: 4rem;
}

.theme-toggle:hover, .lang-toggle:hover {
    transform: scale(1.1);
    background: rgba(255, 255, 255, 0.1);
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
    overflow: hidden;
    color: white;
    text-align: center;
    padding: 2rem;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="80" r="1" fill="rgba(255,255,255,0.1)"/><rect x="10" y="60" width="3" height="3" fill="rgba(255,255,255,0.05)"/><rect x="70" y="10" width="2" height="2" fill="rgba(255,255,255,0.05)"/><polygon points="90,50 92,55 88,55" fill="rgba(255,255,255,0.08)"/></svg>') repeat;
    animation: float 20s linear infinite;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255,100,129,0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(0,188,212,0.1) 0%, transparent 50%),
                radial-gradient(circle at 50% 50%, rgba(255,193,7,0.05) 0%, transparent 50%);
    animation: pulse 4s ease-in-out infinite alternate;
}

@keyframes float {
    0% { transform: translateY(0); }
    100% { transform: translateY(-100vh); }
}

.hero-content {
    z-index: 1;
    max-width: 800px;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    background: var(--accent-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(255, 100, 129, 0.3);
}

.cta-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(255, 100, 129, 0.4);
}

.floating-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.shape {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: floating 6s ease-in-out infinite;
}

.shape1 {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape2 {
    width: 60px;
    height: 60px;
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.shape3 {
    width: 40px;
    height: 40px;
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

.shape4 {
    width: 100px;
    height: 100px;
    top: 10%;
    right: 10%;
    background: rgba(255, 100, 129, 0.1);
    animation: floating 8s ease-in-out infinite reverse;
    animation-delay: 1s;
}

.shape5 {
    width: 50px;
    height: 50px;
    bottom: 30%;
    right: 30%;
    background: rgba(0, 188, 212, 0.1);
    animation: floating 5s ease-in-out infinite;
    animation-delay: 3s;
}

.shape6 {
    width: 70px;
    height: 70px;
    top: 70%;
    left: 5%;
    background: rgba(255, 193, 7, 0.1);
    animation: floating 7s ease-in-out infinite reverse;
    animation-delay: 2s;
}

@keyframes floating {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(180deg); }
}

@keyframes pulse {
    0% { opacity: 0.5; }
    100% { opacity: 1; }
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes grainMove {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(-100px) translateY(-100px); }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* RTL Support */
[dir="rtl"] nav ul {
    flex-direction: row-reverse;
}

[dir="rtl"] .theme-toggle {
    right: auto;
    left: 1rem;
}

[dir="rtl"] .lang-toggle {
    right: auto;
    left: 4rem;
}

[dir="rtl"] .hero-content {
    text-align: right;
}

[dir="rtl"] .skills-grid, [dir="rtl"] .grid {
    direction: rtl;
}

[dir="rtl"] .testimonial {
    text-align: right;
}

[dir="rtl"] form {
    text-align: right;
}

[dir="rtl"] .social-links {
    flex-direction: row-reverse;
}

/* Page-specific backgrounds */
.home-page {
    background: linear-gradient(135deg, var(--bg-color) 0%, #e0f7fa 25%, var(--primary-color) 50%, #ffccbc 75%, var(--accent-color) 100%);
}

.members-page {
    background: linear-gradient(45deg, var(--bg-color) 0%, #c8e6c9 50%, var(--primary-color) 100%);
}

.projects-page {
    background: linear-gradient(-45deg, var(--bg-color) 0%, #bbdefb 50%, var(--secondary-color) 100%);
}

.previews-page {
    background: linear-gradient(90deg, var(--bg-color) 0%, #f3e5f5 50%, var(--accent-color) 100%);
}


.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill {
    text-align: center;
}

.skill h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.progress-bar {
    background: var(--button-bg);
    height: 10px;
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    width: 0;
    border-radius: 5px;
    transition: width 2s ease;
}

.testimonials {
    text-align: center;
}

.testimonial-slider {
    position: relative;
    overflow: hidden;
    height: 200px;
}

.testimonial {
    display: none;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin: 0 auto;
    max-width: 600px;
}

.testimonial.active {
    display: block;
    animation: fadeInUp 0.5s ease;
}

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

.slider-controls {
    margin-top: 1rem;
}

.slider-controls button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    margin: 0 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.slider-controls button:hover {
    background: var(--secondary-color);
    transform: scale(1.1);
}

.contact form {
    max-width: 600px;
    margin: 2rem auto;
}

.contact input, .contact textarea {
    width: 100%;
    margin-bottom: 1rem;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    transition: border-color 0.3s ease;
}

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

.field-error {
    border-color: var(--error-color) !important;
}

.field-success {
    border-color: var(--success-color) !important;
}

.error {
    color: var(--error-text);
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

.success-message {
    background: var(--success-bg);
    color: var(--success-text);
    padding: 1rem;
    border-radius: 5px;
    margin-top: 1rem;
    animation: fadeIn 0.5s ease;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.social-link {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    border: 2px solid var(--primary-color);
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.animate {
    opacity: 1;
    transform: translateY(0);
}

.grid > * {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.grid > *.animate {
    opacity: 1;
    transform: translateY(0);
}

section {
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.02) 50%, transparent 70%);
    animation: shimmer 3s ease-in-out infinite;
    pointer-events: none;
}

section:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 2rem;
    font-weight: 600;
    position: relative;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent-color);
    border-radius: 2px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.member, .project, .preview {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.member::before, .project::before, .preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s;
}

.member:hover::before, .project:hover::before, .preview:hover::before {
    left: 100%;
}

.member:hover, .project:hover, .preview:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.member h3, .project h3, .preview h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.project a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
}

.project a:hover {
    text-decoration: underline;
}

.preview img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-top: 1rem;
}

footer {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-align: center;
    padding: 1.5rem;
    box-shadow: 0 -4px 6px rgba(0, 0, 0, 0.1);
}

form {
    margin-bottom: 2rem;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

input, textarea {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    transition: border-color 0.3s ease;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.1);
}

button {
    background: linear-gradient(135deg, var(--accent-color) 0%, #ff5722 100%);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    font-family: 'Poppins', sans-serif;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 64, 129, 0.3);
}

button {
    position: relative;
    overflow: hidden;
}

button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

button:active::after {
    width: 300px;
    height: 300px;
}

.delete-btn {
    background: var(--delete-bg);
    margin-top: 0.5rem;
}

.delete-btn:hover {
    background: var(--delete-hover);
    box-shadow: 0 5px 15px rgba(220, 53, 69, 0.3);
}

.member-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s ease;
}

.member-link:hover {
    background: var(--secondary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    nav ul {
        flex-direction: column;
    }
    nav ul li {
        margin: 0.5rem 0;
    }
    .grid {
        grid-template-columns: 1fr;
    }
    section {
        padding: 1rem;
    }
}

/* Burger Menu for Mobile */
.menu-toggle {
    display: none;
    position: absolute;
    top: 1rem;
    right: 4rem;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

nav ul {
    transition: max-height 0.3s ease;
    overflow: hidden;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    nav ul {
        flex-direction: column;
        max-height: 0;
    }
    nav ul.open {
        max-height: 500px;
    }
}