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

:root {
    --bg-color: #f5f0e6;
    --bg-secondary: #fff;
    --text-color: #333;
    --text-light: #666;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    --border-radius: 16px;

    --notes-accent: #4fc3f7;
    --reading-accent: #ff9800;
    --words-accent: #4caf50;
    --clock-accent: #26a69a;
    --multiplication-accent: #ef5350;
    --addition-accent: #ffa726;

    --icon-size: 120px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    line-height: 1.6;
}

.header {
    background: var(--bg-secondary);
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 2px 10px var(--shadow);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 10px;
}

.logo-icon {
    font-size: 3rem;
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-light);
}

.main-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 30px 20px;
}

.apps-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.app-card {
    display: flex;
    align-items: center;
    gap: 25px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 25px 30px;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 4px 15px var(--shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow-hover);
}

.app-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    transition: width 0.3s ease;
}

.app-notes::before { background: var(--notes-accent); }
.app-reading::before { background: var(--reading-accent); }
.app-words::before { background: var(--words-accent); }
.app-clock::before { background: var(--clock-accent); }
.app-multiplication::before { background: var(--multiplication-accent); }
.app-addition::before { background: var(--addition-accent); }

.app-card:hover::before {
    width: 8px;
}

.app-icon {
    width: var(--icon-size);
    height: var(--icon-size);
    min-width: var(--icon-size);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    border-radius: 12px;
}

.icon-notes { background-image: url('../img/notes.png'); }
.icon-reading { background-image: url('../img/reading.png'); }
.icon-words { background-image: url('../img/words.png'); }
.icon-clock { background-image: url('../img/clock.png'); }
.icon-multiplication { background-image: url('../img/multiplication.png'); }
.icon-addition { background-image: url('../img/addition.png'); }

.app-content {
    flex: 1;
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.app-notes .app-title { color: var(--notes-accent); }
.app-reading .app-title { color: var(--reading-accent); }
.app-words .app-title { color: var(--words-accent); }
.app-clock .app-title { color: var(--clock-accent); }
.app-multiplication .app-title { color: var(--multiplication-accent); }
.app-addition .app-title { color: var(--addition-accent); }

.app-description {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.7;
}

.coming-soon {
    cursor: default;
    opacity: 0.85;
}

.coming-soon:hover {
    transform: none;
    box-shadow: 0 4px 15px var(--shadow);
}

.coming-soon .app-icon {
    filter: grayscale(30%);
}

.coming-soon-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, #ff9800, #f57c00);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(255, 152, 0, 0.4);
}

.footer {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-light);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .header {
        padding: 20px 15px;
    }

    .logo {
        font-size: 2rem;
    }

    .logo-icon {
        font-size: 2.5rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .main-container {
        padding: 20px 15px;
    }

    .app-card {
        flex-direction: column;
        text-align: center;
        padding: 25px 20px;
    }

    .app-card::before {
        left: 0;
        right: 0;
        top: 0;
        bottom: auto;
        width: 100%;
        height: 5px;
    }

    .app-card:hover::before {
        width: 100%;
        height: 8px;
    }

    :root {
        --icon-size: 100px;
    }

    .app-title {
        font-size: 1.3rem;
    }

    .app-description {
        font-size: 0.95rem;
    }

    .coming-soon-badge {
        top: auto;
        bottom: 15px;
        right: 50%;
        transform: translateX(50%);
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.6rem;
        flex-direction: column;
        gap: 5px;
    }

    .logo-icon {
        font-size: 2rem;
    }

    .app-card {
        padding: 20px 15px;
    }

    :root {
        --icon-size: 80px;
    }

    .app-title {
        font-size: 1.2rem;
    }

    .app-description {
        font-size: 0.9rem;
    }
}