:root {
    /* 🎨 HIGH CONTRAST CUTE PALETTE */

    /* Backgrounds: Darker/Warmer to prevent eye strain */
    --bg-color: #F8E8E8;
    /* Dusty Pink instead of Bright White */
    --container-bg: #FFFBF7;
    /* Off-white Cream */

    /* Elements: Richer colors */
    --pink: #E5737D;
    /* Darker Pink */
    --peach: #EFA886;
    /* Darker Peach */
    --mint: #88C9A1;
    /* Darker Mint */
    --baby-blue: #94A8D6;
    /* Deeper Blue */
    --lavender: #C49ED3;
    /* Deeper Purple */

    /* Text */
    --text-color: #5D5555;
    /* Dark Warm Grey */
    --heading-color: #D65A68;
    /* Strong Pink */

    /* UI */
    --card-bg: #FCF0F5;
    --border-color: #E2B2B2;
    --shadow: 0 5px 15px rgba(181, 142, 142, 0.2);
    --nav-btn-active: #E5737D;

    /* Animation */
    --transition-speed: 0.4s;
}

body.dark-mode {
    --bg-color: #2D2529;
    /* Dark Chocolate/Gray tone */
    --container-bg: #3D3539;
    --text-color: #E8D5D5;
    --heading-color: #E5737D;
    --card-bg: #4A4045;
    --border-color: #665555;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'M PLUS Rounded 1c', 'Quicksand', sans-serif;
    background-color: var(--bg-color);
    background-image:
        radial-gradient(var(--pink) 2px, transparent 2px),
        radial-gradient(var(--peach) 2px, transparent 2px);
    background-size: 30px 30px;
    background-position: 0 0, 15px 15px;
    /* Dotted pattern */
    color: var(--text-color);
    min-height: 100vh;
    padding: 20px;
    display: flex;
    justify-content: center;
    transition: background 0.5s ease;
}

.app-container {
    width: 100%;
    max-width: 1000px;
    background-color: var(--container-bg);
    border-radius: 30px;
    padding: 30px;
    box-shadow: var(--shadow);
    border: 4px solid var(--border-color);
    overflow: hidden;
    /* Important for sliding animation */
}

/* Header */
header {
    text-align: center;
    margin-bottom: 25px;
}

.main-title {
    font-family: 'Gaegu', cursive;
    font-size: 3rem;
    color: var(--heading-color);
    margin-bottom: 5px;
}

.clock {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--baby-blue);
    margin: 10px 0;
    text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.1);
}

.date {
    background-color: var(--mint);
    color: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 1rem;
    display: inline-block;
}

.theme-btn {
    display: block;
    margin: 15px auto 5px;
    background: transparent;
    border: 2px solid var(--text-color);
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: bold;
    color: var(--text-color);
}

/* Navigation */
.nav-bar {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 25px;
}

.nav-btn {
    background-color: var(--card-bg);
    border: 2px solid transparent;
    padding: 12px 30px;
    border-radius: 25px;
    font-family: 'Quicksand', sans-serif;
    font-weight: 700;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1.1rem;
}

.nav-btn.active {
    background-color: var(--nav-btn-active);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

/* Page Transition Animation */
.tab-content {
    display: none;
    /* Default hidden */
    opacity: 0;
    transform: translateX(20px);
    transition: opacity var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.tab-content.active {
    display: block;
    opacity: 1;
    transform: translateX(0);
    animation: slideIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(50px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

/* Home Section */
.hero-card {
    background-color: var(--card-bg);
    border-radius: 25px;
    padding: 40px;
    text-align: center;
    border: 3px dashed var(--lavender);
    margin-bottom: 20px;
}

.status-box {
    margin-top: 15px;
}

.emoji-big {
    font-size: 4rem;
    display: block;
    margin-bottom: 10px;
}

#current-lesson-name {
    font-size: 2rem;
    font-weight: 800;
    color: var(--pink);
}

.quote-card {
    background-color: var(--mint);
    padding: 20px;
    border-radius: 20px;
    color: #fff;
    text-align: center;
    font-family: 'Gaegu', cursive;
    font-size: 1.2rem;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.1);
}

/* Table */
.table-container {
    overflow-x: auto;
    border-radius: 15px;
    border: 3px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--container-bg);
}

th,
td {
    padding: 12px 8px;
    border: 1px solid var(--border-color);
    text-align: center;
}

th {
    background-color: var(--peach);
    color: #fff;
    font-family: 'Gaegu', cursive;
    font-size: 1.2rem;
    text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.1);
}

td.active-lesson {
    background-color: var(--pink) !important;
    color: #fff !important;
    font-weight: bold;
    border: 2px solid #fff;
    box-shadow: 0 0 10px var(--pink);
    animation: pulse 1.5s infinite;
}

.break-row td {
    background-color: var(--lavender) !important;
    color: #fff !important;
    font-weight: bold;
    letter-spacing: 1px;
}

/* Footer */
footer {
    margin-top: 30px;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
}

.creator-name {
    font-weight: bold;
    color: var(--heading-color);
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.02);
    }

    100% {
        transform: scale(1);
    }
}