/* Shelf App - Put it down. Walk away. */

.app-container {
    max-width: 500px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.shelf-intro {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
}

.shelf-intro__heading {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.shelf-intro__subtitle {
    font-size: var(--font-size-md);
    font-weight: 300;
    color: var(--text-tertiary);
    letter-spacing: 0.2px;
}

.shelf-form {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
}

.shelf-form__label {
    display: block;
    font-size: var(--font-size-md);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.shelf-form__privacy {
    margin: calc(-1 * var(--spacing-xs)) 0 var(--spacing-md);
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
    line-height: 1.45;
}

.shelf-form__textarea {
    width: 100%;
    min-height: 180px;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: var(--font-size-md);
    line-height: 1.6;
    resize: vertical;
}

.shelf-form__textarea:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 1px;
    border-color: transparent;
}

.shelf-form__textarea::placeholder {
    color: var(--text-tertiary);
}

.shelf-form__actions {
    margin-top: var(--spacing-md);
    display: flex;
    justify-content: flex-end;
}

.shelf-form__save {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--accent-color);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-md);
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.shelf-form__save:hover {
    opacity: 0.9;
}

.shelf-form__save:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.shelf-form__save--saved {
    background: var(--accent-color);
    opacity: 0.7;
}

.shelf-form__mood {
    margin-top: var(--spacing-md);
    text-align: center;
}

.shelf-form__mood-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-sm);
}

.shelf-form__mood-options {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.shelf-form__mood-btn {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
    line-height: 1;
    border: 2px solid transparent;
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.shelf-form__mood-btn:hover {
    border-color: var(--border-color);
}

.shelf-form__mood-btn--selected {
    border-color: var(--accent-color);
    background: var(--bg-primary);
}

.shelf-entry__mood {
    display: inline-block;
    margin-left: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.shelf-entries {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-md);
}

.shelf-entries__heading {
    font-size: var(--font-size-sm);
    font-weight: 400;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
}

.shelf-entries__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.shelf-entry {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
}

.shelf-entry__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.shelf-entry__date {
    font-size: var(--font-size-sm);
    font-weight: 300;
    color: var(--text-tertiary);
    min-width: 0;
}

.shelf-entry__delete {
    flex: 0 0 auto;
    min-width: 44px;
    min-height: 36px;
    padding: 6px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-primary);
    color: var(--text-tertiary);
    font: inherit;
    font-size: var(--font-size-sm);
    cursor: pointer;
    text-decoration: none;
}

.shelf-entry__delete:hover,
.shelf-entry__delete:focus-visible {
    color: var(--accent-color);
}

.shelf-entry__text {
    font-size: var(--font-size-md);
    color: var(--text-primary);
    line-height: 1.5;
    white-space: pre-wrap;
}

.shelf-empty {
    text-align: center;
    color: var(--text-tertiary);
    font-size: var(--font-size-md);
    padding: var(--spacing-xl) 0;
}

@media (max-width: 480px) {
    .app-container {
        max-width: 100%;
        padding: var(--spacing-md);
    }

    .shelf-form__mood-options {
        flex-wrap: wrap;
    }
}

@media (min-width: 900px) {
    .app-container {
        max-width: 1040px;
        padding: 96px 32px 56px;
        display: grid;
        grid-template-columns: minmax(360px, 0.95fr) minmax(320px, 1.05fr);
        grid-template-areas:
            "intro entries"
            "form entries";
        align-items: start;
        gap: 22px 32px;
    }

    .shelf-intro {
        grid-area: intro;
        text-align: left;
        margin-bottom: 0;
        padding-bottom: 0;
    }

    .shelf-intro__heading {
        font-size: 2rem;
    }

    .shelf-form {
        grid-area: form;
        position: sticky;
        top: 96px;
    }

    .shelf-entries {
        grid-area: entries;
        margin-top: 0;
        padding-top: 0;
    }

    .shelf-entries__list {
        gap: var(--spacing-sm);
    }
}