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

:root {
    --primary: #d4380d;
    --primary-light: #ff7a45;
    --secondary: #722ed1;
    --gold: #faad14;
    --bg-dark: #1a1a2e;
    --bg-card: #16213e;
    --text-light: #f5f5f5;
    --text-muted: #a0a0a0;
    --festival: #52c41a;
    --holiday: #f5222d;
}

body {
    font-family: 'Poppins', 'Noto Sans Bengali', sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    color: var(--text-light);
    padding: 20px;
    overflow-y: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding-bottom: 40px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px;
    background: linear-gradient(135deg, rgba(212, 56, 13, 0.2), rgba(114, 46, 209, 0.2));
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.logo {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 50px;
    box-shadow: 0 10px 30px rgba(212, 56, 13, 0.4);
    animation: pulse 2s ease-in-out infinite;
}

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

.header-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--gold), var(--primary-light));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
}

.header-bengali {
    font-size: 1.8rem;
    color: var(--gold);
    font-family: 'Noto Sans Bengali', sans-serif;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    margin-top: 10px;
}

.divider {
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    margin: 30px auto;
    border-radius: 2px;
}

.calendar-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.calendar-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px 30px;
    cursor: pointer;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.calendar-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.calendar-card:hover::before {
    opacity: 0.15;
}

.calendar-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(212, 56, 13, 0.4);
    border-color: var(--primary);
}

.calendar-card.solar::before {
    background: linear-gradient(135deg, var(--secondary), var(--festival));
}

.calendar-card.solar:hover {
    box-shadow: 0 20px 50px rgba(114, 46, 209, 0.4);
    border-color: var(--secondary);
}

.card-icon { font-size: 70px; margin-bottom: 20px; position: relative; z-index: 1; }
.card-title { font-size: 1.8rem; color: var(--gold); font-weight: 600; margin-bottom: 15px; position: relative; z-index: 1; font-family: 'Noto Sans Bengali', sans-serif; }
.card-description { font-size: 0.95rem; color: var(--text-muted); line-height: 1.6; position: relative; z-index: 1; margin-bottom: 20px; }
.btn { display: inline-block; padding: 12px 30px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: white; border-radius: 25px; text-decoration: none; font-weight: 600; transition: all 0.3s ease; position: relative; z-index: 1; border: none; cursor: pointer; font-size: 1rem; }

.calendar-card.solar .btn { background: linear-gradient(135deg, var(--secondary), var(--festival)); }
.calendar-card:hover .btn { transform: scale(1.1); box-shadow: 0 5px 15px rgba(212, 56, 13, 0.4); }

.today-info { display: flex; justify-content: center; gap: 30px; margin-top: 30px; flex-wrap: wrap; }
.today-box { background: rgba(255, 255, 255, 0.05); padding: 20px 30px; border-radius: 15px; text-align: center; border: 1px solid rgba(255, 255, 255, 0.1); }
.today-box .label { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 8px; }
.today-box .bengali-date { font-size: 1.5rem; font-weight: 600; color: var(--gold); font-family: 'Noto Sans Bengali', sans-serif; }
.today-box .english-date { font-size: 1rem; color: var(--text-light); margin-top: 5px; }

.features { margin-top: 50px; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.feature-box { background: rgba(255, 255, 255, 0.05); padding: 25px; border-radius: 15px; text-align: center; border: 1px solid rgba(255, 255, 255, 0.1); transition: all 0.3s ease; }
.feature-box:hover { background: rgba(255, 255, 255, 0.08); transform: translateY(-5px); }
.feature-icon { font-size: 40px; margin-bottom: 15px; }
.feature-title { font-size: 1.1rem; font-weight: 600; color: var(--gold); margin-bottom: 10px; }
.feature-desc { font-size: 0.9rem; color: var(--text-muted); line-height: 1.5; }

@media (max-width: 768px) { body { padding: 15px; } header { padding: 30px 20px; } .header-title { font-size: 1.8rem; } .header-bengali { font-size: 1.4rem; } .calendar-options { grid-template-columns: 1fr; } .card-title { font-size: 1.5rem; } .today-box { padding: 15px 20px; } }