styles.css

:root {
    --accent: #4da6ff;
    --bg1: #081120;
    --bg2: #162235;
    --glass: rgba(255,255,255,0.10);
    --glass-border: rgba(255,255,255,0.18);
    --text: #ffffff;
    --text-secondary: rgba(255,255,255,0.75);
    --shadow: rgba(0,0,0,0.25);
    --success: #4ade80;
    --danger: #ff6b6b;
    --radius: 28px;
    --blur: 30px;
}

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

body {
    min-height: 100vh;
    font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, #1f3c88 0%, transparent 40%),
        radial-gradient(circle at bottom right, #4c1d95 0%, transparent 40%),
        linear-gradient(135deg, var(--bg1), var(--bg2));
    overflow-x: hidden;
    padding: 24px;
}

/* Background blur blobs */

.background-blur {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.35;
    z-index: -1;
}

.blur1 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    top: -80px;
    left: -80px;
}

.blur2 {
    width: 400px;
    height: 400px;
    background: #7c3aed;
    bottom: -150px;
    right: -150px;
}

/* Glass effect */

.glass {
    background: var(--glass);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border: 1px solid var(--glass-border);
    box-shadow:
        0 8px 32px var(--shadow),
        inset 0 1px 1px rgba(255,255,255,0.12);
}

/* Header */

.header {
    border-radius: var(--radius);
    padding: 30px;
    margin-bottom: 24px;
}

.title-section h1 {
    font-size: 2.3rem;
    font-weight: 700;
}

.title-section p {
    color: var(--text-secondary);
    margin-top: 8px;
}

.header-controls {
    margin-top: 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.header-controls input,
.header-controls select {
    flex: 1;
    min-width: 180px;
}

/* Dashboard */

.dashboard {
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;

    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px,1fr));
    gap: 20px;
}

.stat-card {
    text-align: center;
    padding: 24px;
    border-radius: 22px;
    background: rgba(255,255,255,0.06);
    transition: transform 0.25s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
}

.stat-card h2 {
    font-size: 2rem;
    color: var(--accent);
}

.stat-card p {
    color: var(--text-secondary);
    margin-top: 6px;
}

/* Control buttons */

.controls-panel {
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 24px;

    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

button {
    border: none;
    border-radius: 18px;
    padding: 12px 22px;
    cursor: pointer;

    background: rgba(255,255,255,0.10);
    color: white;

    font-weight: 600;
    transition: 0.25s;
}

button:hover {
    background: var(--accent);
    transform: translateY(-2px);
}

/* Inputs */

input,
select,
textarea {
    border: none;
    outline: none;

    border-radius: 18px;
    padding: 12px 16px;

    background: rgba(255,255,255,0.08);
    color: white;

    font-family: inherit;
    font-size: 0.95rem;

    transition: 0.2s;
}

input:focus,
select:focus,
textarea:focus {
    box-shadow: 0 0 0 2px var(--accent);
}

input::placeholder,
textarea::placeholder {
    color: rgba(255,255,255,0.55);
}

select option {
    background: #182538;
    color: white;
}

/* Progress section */

.progress-section {
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
}

.progress-section h2 {
    margin-bottom: 18px;
}

.progress-bar {
    width: 100%;
    height: 18px;
    border-radius: 999px;
    overflow: hidden;
    background: rgba(255,255,255,0.08);
}

#progressFill {
    width: 0%;
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(
        90deg,
        var(--accent),
        #8ec5ff
    );
    transition: width 0.5s ease;
}

#progressText {
    margin-top: 12px;
    color: var(--text-secondary);
}

/* History */

.history-section {
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
}

#readingHistory {
    margin-top: 14px;
    color: var(--text-secondary);
}

/* Books */

#booksContainer {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.book {
    border-radius: 28px;
    overflow: hidden;
    transition: 0.25s;
}

.book:hover {
    transform: translateY(-3px);
}

.book.complete {
    border: 2px solid var(--success);
}

.book-header {
    padding: 22px 24px;
    cursor: pointer;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.book-header h3 {
    font-size: 1.1rem;
}

.book-progress {
    color: var(--text-secondary);
}

.chapters {
    display: none;
    padding: 0 24px 24px;
    animation: fadeIn 0.3s ease;
}

.chapter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px,1fr));
    gap: 10px;
    margin-top: 10px;
}

.chapter {
    display: flex;
    align-items: center;
    gap: 10px;

    padding: 10px 14px;
    border-radius: 16px;

    background: rgba(255,255,255,0.06);
}

.chapter input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

.chapter.completed {
    background: rgba(74,222,128,0.15);
}

/* Notes */

.notes {
    width: 100%;
    min-height: 120px;
    margin-top: 20px;
    resize: vertical;
}

/* Toast */

.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;

    padding: 14px 24px;

    border-radius: 18px;

    background: rgba(0,0,0,0.75);
    backdrop-filter: blur(20px);

    opacity: 0;
    transform: translateY(20px);

    pointer-events: none;

    transition: 0.3s;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* Modal */

.modal-overlay {
    position: fixed;
    inset: 0;

    display: flex;
    align-items: center;
    justify-content: center;

    background: rgba(0,0,0,0.5);
    z-index: 1000;
}

.modal {
    width: 90%;
    max-width: 500px;

    padding: 30px;
    border-radius: 28px;
}

.modal h2 {
    margin-bottom: 12px;
}

.modal p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hidden {
    display: none;
}

/* Footer */

.footer {
    margin-top: 40px;
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
}

.footer p:first-child {
    margin-bottom: 6px;
}

/* Scrollbar */

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.05);
}

::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.2);
    border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Animations */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile */

@media (max-width: 768px) {

    body {
        padding: 14px;
    }

    .header {
        padding: 22px;
    }

    .title-section h1 {
        font-size: 1.8rem;
    }

    .dashboard {
        grid-template-columns: 1fr 1fr;
    }

    .controls-panel {
        flex-direction: column;
    }

    button {
        width: 100%;
    }

    .chapter-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 500px) {

    .dashboard {
        grid-template-columns: 1fr;
    }

    .chapter-grid {
        grid-template-columns: 1fr;
    }

    .book-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
}