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

/* Light Mode: General Styles */
body {
    font-family: 'Inter', Arial, sans-serif;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 50%, #f8f9fa 100%);
    color: #212529;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    font-size: 16px; /* Base font size */
}

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

/* Mobile-first font size adjustments */
@media (max-width: 768px) {
    body {
        font-size: 14px; /* Smaller base font for mobile */
        line-height: 1.5;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 13px; /* Even smaller for very small screens */
    }
}

/* Animated Background Particles */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(30, 168, 4, 0.1) 2px, transparent 0),
        radial-gradient(circle at 80% 20%, rgba(128, 21, 173, 0.1) 2px, transparent 0),
        radial-gradient(circle at 40% 40%, rgba(255, 107, 107, 0.1) 1px, transparent 0);
    background-size: 50% 50%, 60% 60%, 70% 70%;
    animation: float 20s infinite linear;
    pointer-events: none;
    z-index: -1;
}

@keyframes float {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-50px, -50px) rotate(360deg); }
}

/* Header Styles with Animated Gradient */
header {
    background: linear-gradient(135deg, #1ea804 0%, #17803a 25%, #25D366 50%, #17803a 75%, #1ea804 100%);
    background-size: 400% 400%;
    animation: headerGradient 8s ease infinite;
    color: #ffffff;
    padding: 15px 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

header h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.5px;
}

/* Mobile header text adjustments */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.4rem;
    }
    
    header {
        padding: 12px 15px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.2rem;
    }
    
    header {
        padding: 10px 12px;
    }
}

/* Navigation Styling with Glass Morphism */
nav ul {
    padding: 0;
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 10px 0 0 0;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0;
}

nav ul li a,
nav ul li button {
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 25px;
    display: inline-block;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

/* Mobile navigation text adjustments */
@media (max-width: 768px) {
    nav ul li a,
    nav ul li button {
        font-size: 0.8rem;
        padding: 8px 16px;
    }
    
    nav ul {
        gap: 8px;
    }
}

@media (max-width: 480px) {
    nav ul li a,
    nav ul li button {
        font-size: 0.75rem;
        padding: 6px 12px;
    }
}

nav ul li a::before,
nav ul li button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s;
}

nav ul li a:hover::before,
nav ul li button:hover::before {
    left: 100%;
}

nav ul li a:hover,
nav ul li button:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Main Content */
main {
    flex: 1;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Mobile main content adjustments */
@media (max-width: 768px) {
    main {
        padding: 15px;
    }
}

@media (max-width: 480px) {
    main {
        padding: 10px;
    }
}

/* Center alignment for header content */
main > center {
    margin-bottom: 30px;
    position: relative;
}

main > center img {
    border-radius: 50%;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    margin-bottom: 10px;
    border: 4px solid #1ea804;
    animation: floatLogo 6s ease-in-out infinite;
    transition: all 0.4s ease;
    width: 80px;
    height: 80px;
}

/* Mobile logo adjustments */
@media (max-width: 768px) {
    main > center img {
        width: 60px;
        height: 60px;
    }
}

@keyframes floatLogo {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(5deg); }
}

main > center img:hover {
    transform: scale(1.1) rotate(10deg);
    box-shadow: 0 12px 35px rgba(30, 168, 4, 0.4);
}

main h2 {
    background: linear-gradient(135deg, #1ea804, #8015ad, #25D366);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textGradient 4s ease infinite;
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-align: center;
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

/* Mobile heading adjustments */
@media (max-width: 768px) {
    main h2 {
        font-size: 1.8rem;
        margin-bottom: 8px;
    }
}

@media (max-width: 480px) {
    main h2 {
        font-size: 1.5rem;
        margin-bottom: 5px;
    }
}

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

/* Animated Warning Box */
.warning-box {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 50%, #fff3cd 100%);
    background-size: 200% 200%;
    animation: warningPulse 6s ease infinite;
    border-left: 6px solid #ff6b6b;
    border-radius: 20px;
    padding: 25px;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(255, 107, 107, 0.2);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
    transition: all 0.4s ease;
}

/* Mobile warning box adjustments */
@media (max-width: 768px) {
    .warning-box {
        padding: 20px;
        margin-bottom: 30px;
        border-radius: 15px;
    }
}

@media (max-width: 480px) {
    .warning-box {
        padding: 15px;
        margin-bottom: 25px;
        border-radius: 12px;
        border-left-width: 4px;
    }
}

.warning-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #ff6b6b, #e84393, #8015ad);
    animation: borderFlow 3s linear infinite;
}

@keyframes borderFlow {
    0% { background-position: 0% 0%; }
    100% { background-position: 400% 0%; }
}

@keyframes warningPulse {
    0%, 100% { background-position: 0% 50%; transform: scale(1); }
    50% { background-position: 100% 50%; transform: scale(1.02); }
}

.warning-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(255, 107, 107, 0.3);
}

.warning-box strong {
    color: #d63031;
    font-size: 1.2rem;
    display: block;
    margin-bottom: 15px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

/* Mobile warning text adjustments */
@media (max-width: 768px) {
    .warning-box strong {
        font-size: 1.1rem;
        margin-bottom: 12px;
    }
}

@media (max-width: 480px) {
    .warning-box strong {
        font-size: 1rem;
        margin-bottom: 10px;
    }
}

.tos-link {
    color: #e84393;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    padding: 2px 4px;
    border-radius: 4px;
}

.tos-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #e84393;
    transition: width 0.3s ease;
}

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

.tos-link:hover {
    color: #fd79a8;
    background: rgba(232, 67, 147, 0.1);
    text-decoration: none;
}

.warning-box h2 {
    color: #2d3436;
    font-size: 1.1rem;
    margin: 15px 0;
    text-align: right;
    direction: rtl;
    line-height: 1.8;
}

.warning-box h3 {
    text-align: center;
    margin-top: 20px;
}

/* Mobile warning box text adjustments */
@media (max-width: 768px) {
    .warning-box h2 {
        font-size: 1rem;
        margin: 12px 0;
        line-height: 1.6;
    }
    
    .warning-box h3 {
        margin-top: 15px;
    }
}

@media (max-width: 480px) {
    .warning-box h2 {
        font-size: 0.9rem;
        margin: 10px 0;
        line-height: 1.5;
    }
    
    .warning-box h3 {
        margin-top: 12px;
    }
}

.warning-box h3 a {
    background: linear-gradient(135deg, #8015ad, #6c5ce7, #8015ad);
    background-size: 200% 200%;
    animation: buttonGradient 3s ease infinite;
    color: white;
    padding: 12px 30px;
    border-radius: 30px;
    transition: all 0.4s ease;
    display: inline-block;
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 6px 15px rgba(128, 21, 173, 0.3);
    font-size: 1rem;
}

/* Mobile button text adjustments */
@media (max-width: 768px) {
    .warning-box h3 a {
        padding: 10px 25px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .warning-box h3 a {
        padding: 8px 20px;
        font-size: 0.85rem;
    }
}

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

.warning-box h3 a:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 12px 25px rgba(128, 21, 173, 0.4);
}

/* WhatsApp Contact with Animation */
main h5 {
    text-align: center;
    background: linear-gradient(135deg, #25D366, #128C7E);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.3rem;
    margin: 25px 0 35px 0;
    font-weight: 700;
    animation: whatsappPulse 2s ease-in-out infinite;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
}

/* Mobile WhatsApp text adjustments */
@media (max-width: 768px) {
    main h5 {
        font-size: 1.1rem;
        margin: 20px 0 25px 0;
    }
}

@media (max-width: 480px) {
    main h5 {
        font-size: 1rem;
        margin: 15px 0 20px 0;
    }
}

@keyframes whatsappPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Enhanced Subject Cards Grid */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 25px;
    padding: 20px 0;
}

/* Mobile grid adjustments */
@media (max-width: 768px) {
    .subject-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
        padding: 15px 0;
    }
}

@media (max-width: 480px) {
    .subject-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 10px 0;
    }
}

.subject-card {
    background: linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: 20px;
    padding: 0;
    box-shadow: 
        0 8px 25px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    text-align: left;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(30, 168, 4, 0.1);
}

.subject-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, #1ea804, #25D366, #8015ad, #6c5ce7);
    background-size: 400% 400%;
    animation: borderFlow 4s linear infinite;
}

.subject-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(30, 168, 4, 0.1), transparent);
    transition: left 0.6s;
}

.subject-card:hover::after {
    left: 100%;
}

.subject-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 8px 20px rgba(30, 168, 4, 0.2);
    border-color: rgba(30, 168, 4, 0.3);
}

.subject-card a {
    text-decoration: none;
    color: inherit;
    display: block;
    padding: 25px;
    height: 100%;
    position: relative;
    z-index: 1;
}

/* Mobile card padding adjustments */
@media (max-width: 768px) {
    .subject-card a {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .subject-card a {
        padding: 15px;
    }
}

.subject-card h3 {
    margin: 0;
    font-size: 1.15rem;
    color: #2d3436;
    transition: all 0.4s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    line-height: 1.4;
}

/* Mobile card text adjustments */
@media (max-width: 768px) {
    .subject-card h3 {
        font-size: 1rem;
        gap: 8px;
        line-height: 1.3;
    }
}

@media (max-width: 480px) {
    .subject-card h3 {
        font-size: 0.9rem;
        gap: 6px;
        line-height: 1.2;
    }
}

.subject-card:hover h3 {
    color: #1ea804;
    transform: translateX(5px);
}

.subject-card img {
    border-radius: 6px;
    transition: all 0.3s ease;
    max-width: 100%;
    height: auto;
}

.subject-card:hover img {
    transform: scale(1.1) rotate(5deg);
}

/* New GIF indicator with enhanced animation */
.subject-card img[src*="new.gif"] {
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(255, 107, 107, 0.3);
    animation: newPulse 2s ease-in-out infinite;
}

@keyframes newPulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 4px 8px rgba(255, 107, 107, 0.3);
    }
    50% { 
        transform: scale(1.1);
        box-shadow: 0 6px 12px rgba(255, 107, 107, 0.5);
    }
}

/* Enhanced Dark Mode with Better Mobile Support */
body.dark-mode {
    background: linear-gradient(135deg, #0a0a0a 0%, #121212 50%, #1a1a1a 100%);
    background-size: 400% 400%;
    animation: gradientShift 20s ease infinite;
    color: #e8e8e8;
}

body.dark-mode::before {
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(30, 168, 4, 0.2) 2px, transparent 0),
        radial-gradient(circle at 80% 20%, rgba(128, 21, 173, 0.2) 2px, transparent 0),
        radial-gradient(circle at 40% 40%, rgba(107, 255, 206, 0.15) 1px, transparent 0);
}

body.dark-mode header {
    background: linear-gradient(135deg, #0a3d1c 0%, #0d5c26 25%, #1ea804 50%, #0d5c26 75%, #0a3d1c 100%);
    background-size: 400% 400%;
}

body.dark-mode .warning-box {
    background: linear-gradient(135deg, #1e1e1e 0%, #2d3436 50%, #3a3a3a 100%);
    background-size: 200% 200%;
    animation: warningPulse 8s ease infinite;
    border-left-color: #e84393;
    color: #e8e8e8;
}

body.dark-mode .warning-box strong {
    color: #ff7675;
}

body.dark-mode .warning-box h2 {
    color: #dfe6e9;
}

body.dark-mode .subject-card {
    background: linear-gradient(145deg, #1e1e1e 0%, #2d3436 100%);
    border-color: rgba(30, 168, 4, 0.3);
    color: #e8e8e8;
}

body.dark-mode .subject-card h3 {
    color: #e8e8e8;
}

body.dark-mode .subject-card:hover h3 {
    color: #25D366;
}

body.dark-mode .subject-card:hover {
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 8px 20px rgba(30, 168, 4, 0.4);
}

/* Enhanced Dark Mode Text Readability */
body.dark-mode .tos-link {
    color: #fd79a8;
}

body.dark-mode .tos-link:hover {
    color: #ff9fb4;
    background: rgba(253, 121, 168, 0.15);
}

/* Enhanced Footer */
footer {
    text-align: center;
    padding: 25px;
    background: linear-gradient(135deg, #1ea804 0%, #17803a 50%, #1ea804 100%);
    background-size: 400% 400%;
    animation: headerGradient 6s ease infinite;
    color: #ffffff;
    margin-top: auto;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
    font-size: 1rem;
}

/* Mobile footer adjustments */
@media (max-width: 768px) {
    footer {
        padding: 20px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    footer {
        padding: 15px;
        font-size: 0.85rem;
    }
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    animation: shine 3s ease-in-out infinite;
}

@keyframes shine {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

/* Loading Animation for Cards */
@keyframes cardEntrance {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subject-card {
    animation: cardEntrance 0.6s ease-out;
    animation-fill-mode: both;
}

/* Stagger animation for multiple cards */
.subject-card:nth-child(odd) {
    animation-delay: 0.1s;
}

.subject-card:nth-child(even) {
    animation-delay: 0.2s;
}

/* Improved touch targets for mobile */
@media (max-width: 768px) {
    nav ul li a,
    nav ul li button,
    .warning-box h3 a,
    .subject-card a {
        min-height: 44px; /* Apple's recommended touch target size */
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* Better scrolling on mobile */
@media (max-width: 768px) {
    html {
        -webkit-overflow-scrolling: touch;
    }
    
    body {
        -webkit-tap-highlight-color: transparent;
    }
}