/* ===== Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: #0f0f23;
    color: #e0e0e0;
    overflow-x: hidden;
}

/* ===== Navigation ===== */
.nav-bar {
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(10px);
    padding: 10px 40px;
    width: 100%;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

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

.logo {
    display: block;
}

.status-badge {
    background: linear-gradient(135deg, #00ff88, #00d4ff);
    color: #0f0f23;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9em;
    animation: pulse 2s infinite;
    margin-top: 25px;
    text-align: right;
}

/* ===== Hero Section ===== */
.hero {
    padding: 80px 40px 0px 40px;
    text-align: center;
    background: radial-gradient(ellipse at center top, rgba(0, 255, 136, 0.1) 0%, transparent 50%);
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #00ff88, #00d4ff, #ff00ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.3em;
    color: #888;
    margin-bottom: 40px;
}

/* ===== Stats ===== */
.stats-container {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin: 40px 0;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5em;
    font-weight: 700;
    color: #00ff88;
}

.stat-label {
    color: #666;
    text-transform: uppercase;
    font-size: 0.9em;
    letter-spacing: 1px;
}

/* ===== Main Content Container ===== */
.main-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 25px 40px 60px 40px;
}

/* ===== Card Styles (Shared) ===== */
.announcement-card,
.platform-preview,
.preview-section,
.teachers-section {
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 60px;
}

.announcement-card {
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.05), rgba(0, 212, 255, 0.05));
    border: 1px solid rgba(0, 255, 136, 0.3);
    position: relative;
    overflow: hidden;
}

.announcement-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #00ff88, #00d4ff, #ff00ff);
    border-radius: 20px;
    opacity: 0.5;
    z-index: -1;
    animation: borderGlow 3s ease-in-out infinite;
}

.platform-preview {
    background: #1a1a2e;
    margin: 60px 0;
}

.preview-section {
    background: #0a0a14;
    border-radius: 15px;
    padding: 30px;
    margin: 40px 0;
}

.teachers-section {
    background: #1a1a2e;
    border: 1px solid rgba(255,255,255,0.1);
    margin: 60px 0;
    text-align: center;
}

/* ===== Typography ===== */
.announcement-card h2 {
    font-size: 2em;
    margin-bottom: 20px;
    color: #fff;
}

.announcement-card p {
    font-size: 1.1em;
    line-height: 1.7;
    color: #ccc;
}

/* Shared h3 styles */
.platform-preview h3,
.preview-header h3,
.teachers-section h3 {
    font-size: 1.8em;
    margin-bottom: 20px;
    color: #00ff88;
}

.preview-header h3 {
    margin-bottom: 10px;
}

.platform-preview h3 {
    margin-bottom: 30px;
}

.teachers-section h3 {
    color: #fff;
}

.preview-header {
    text-align: center;
    margin-bottom: 30px;
}

.preview-header p {
    color: #888;
}

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: 25px;
    margin: 40px 0 0 0;
}

.feature-item {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 25px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    background: rgba(255,255,255,0.06);
    border-color: #00ff88;
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2em;
    margin-bottom: 15px;
    display: inline-block;
    background: linear-gradient(135deg, #00ff88, #00d4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-title {
    font-size: 1.2em;
    margin-bottom: 10px;
    color: #fff;
}

.feature-desc {
    color: #888;
    line-height: 1.6;
}

/* ===== Schedule Grid ===== */
.schedule-grid {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 10px 15px;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
}

.day-label {
    color: #fff;
    font-size: 1.05em;
    font-weight: bold;
    text-align: right;
}

.time-info {
    font-size: 1.05em;
    text-align: left;
}

/* ===== CTA Button ===== */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #00ff88, #00d4ff);
    color: #0f0f23;
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1em;
    margin-top: 20px;
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

.cta-button:hover {
    transform: scale(1.05);
}

/* ===== Message Section ===== */
.message {
    max-width: 700px;
    margin: 60px auto;
    text-align: center;
}

.message p {
    font-size: 1.1em;
    line-height: 1.8;
    color: #aaa;
    margin-bottom: 20px;
}

/* ===== Animations ===== */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

@keyframes borderGlow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

/* ===== Mobile Responsive ===== */
@media (max-width: 768px) {
    .nav-bar {
        padding: 15px 20px;
    }

    .hero {
        padding: 60px 20px;
    }

    .stats-container {
        gap: 30px;
    }

    .announcement-card,
    .platform-preview,
    .teachers-section {
        padding: 30px 20px;
    }

    .main-content {
        padding: 20px;
    }
}

@media (max-width: 600px) {
    /* Schedule grid mobile */
    .schedule-grid {
        grid-template-columns: 1fr;
        gap: 5px;
    }

    .day-label {
        text-align: left;
        margin-top: 15px;
        font-size: 1.1em;
    }

    .day-label:first-child {
        margin-top: 0;
    }

    .time-info {
        margin-bottom: 10px;
        padding-left: 0;
    }
}