/* Base Layout & Math Club Dark Theme Theme */
body {
    background-color: #0b0f19;
    color: #e2e8f0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

/* Main Calendar Container Box */
.calendar-container {
    background: #111827;
    width: 90%;
    max-width: 650px;
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border: 1px solid #1f2937;
}

/* Top Navigation Header Controls */
.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    border-bottom: 1px solid #1f2937;
    padding-bottom: 15px;
}

/* Month & Year Text Display styling */
.calendar-header h2 {
    font-family: 'Vibur', cursive, sans-serif;
    font-size: 2.2rem;
    margin: 0;
    color: #38bdf8;
    text-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
    letter-spacing: 1px;
}

/* Arrow Navigation Buttons */
.calendar-header button {
    background: #1f2937;
    color: #38bdf8;
    border: 1px solid #374151;
    font-size: 1.2rem;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.calendar-header button:hover {
    background: #38bdf8;
    color: #0b0f19;
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
}

/* Weekdays Grid Configuration (Sun-Sat) */
.weekdays-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    text-align: center;
    font-weight: 600;
    color: #64748b;
    margin-bottom: 10px;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

/* Main Grid Layout for Days */
.days-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

/* Individual Day Container Square Box */
.calendar-day-box {
    background: #1f2937;
    border: 1px solid #374151;
    border-radius: 8px;
    min-height: 70px;
    padding: 6px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-start;
    transition: all 0.2s ease;
}

.calendar-day-box:hover {
    border-color: #38bdf8;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Small Day Digit Number Styling */
.day-number {
    font-size: 0.95rem;
    font-weight: 500;
    color: #94a3b8;
}

/* Custom Math Text Layout under the number */
.day-trivia-text {
    font-size: 0.65rem;
    color: #38bdf8;
    background: rgba(56, 189, 248, 0.1);
    padding: 2px 4px;
    border-radius: 4px;
    width: 90%;
    text-align: center;
    line-height: 1.2;
    word-break: break-word;
    margin-top: auto;
}

/* Current Day highlight layout marker matching system clock */
.current-day {
    background: rgba(56, 189, 248, 0.15) !important;
    border: 2px solid #38bdf8 !important;
}

.current-day .day-number {
    color: #fff;
    font-weight: bold;
}