/* === Variables === */
:root {
    --tu-color-white: #fff;
    --tu-color-black: #000;
    --tu-color-purple: #C8B6FF;
    --tu-color-green: #7FC6C0;
    --tu-color-yellow: #FFD300;
    --tu-color-orange: #FFAA35;
    --tu-color-beige: #F0E7C8;
    --tu-color-pink: #F9C294;

    --tu-color-bg: var(--tu-color-beige);
    --tu-color-surface: var(--tu-color-white);
    --tu-color-text: #1a1a1a;
    --tu-color-text-muted: #555;
    --tu-color-link: #6B5CA5;
    --tu-color-border: #ddd;
    --tu-color-danger: #e74c3c;

    --tu-spacing-xs: 0.25rem;
    --tu-spacing-sm: 0.5rem;
    --tu-spacing-md: 1rem;
    --tu-spacing-lg: 1.5rem;
    --tu-spacing-xl: 2rem;

    --tu-radius: 8px;
    --tu-radius-sm: 4px;

    --tu-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --tu-font-size: 16px;
    --tu-font-size-sm: 0.875rem;
    --tu-font-size-lg: 1.25rem;

    --tu-max-width: 960px;
}

/* === Reset === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* === Base === */
body {
    font-family: var(--tu-font-family);
    font-size: var(--tu-font-size);
    color: var(--tu-color-text);
    background-color: var(--tu-color-bg);
    line-height: 1.6;
}

a {
    color: var(--tu-color-text);
    text-decoration: none;
}

/* === Nav === */
.nav {
    background-color: var(--tu-color-black);
    color: var(--tu-color-white);
    padding: var(--tu-spacing-md) var(--tu-spacing-lg);
}

.nav__container {
    max-width: var(--tu-max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav__logo {
    color: var(--tu-color-yellow);
    font-weight: 700;
    font-size: var(--tu-font-size-lg);
}

.nav__links {
    display: flex;
    gap: var(--tu-spacing-lg);
}

.nav__links a {
    color: var(--tu-color-white);
    font-size: var(--tu-font-size-sm);
    transition: color 0.2s;
}

.nav__links a:hover {
    color: var(--tu-color-yellow);
}

.nav__toggle {
    display: none;
    background: none;
    border: none;
    color: var(--tu-color-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--tu-spacing-xs);
}

@media (max-width: 768px) {
    .nav__container {
        flex-wrap: wrap;
    }

    .nav__toggle {
        display: block;
    }

    .nav__links {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 0;
        padding-top: var(--tu-spacing-md);
    }

    .nav__links--open {
        display: flex;
    }

    .nav__links a {
        padding: var(--tu-spacing-sm) 0;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
}

/* === Main === */
.main {
    max-width: var(--tu-max-width);
    margin: 0 auto;
    padding: var(--tu-spacing-xl) var(--tu-spacing-lg);
}

/* === Flash messages === */
.flash {
    padding: var(--tu-spacing-sm) var(--tu-spacing-md);
    border-radius: var(--tu-radius-sm);
    margin-bottom: var(--tu-spacing-lg);
    font-size: var(--tu-font-size-sm);
    transition: opacity 0.3s;
}

.flash--success {
    background-color: var(--tu-color-green);
    color: var(--tu-color-black);
}

.flash--error {
    background-color: var(--tu-color-danger);
    color: var(--tu-color-white);
}

/* === Auth === */
.auth {
    max-width: 400px;
    margin: var(--tu-spacing-xl) auto;
}

.auth__title {
    margin-bottom: var(--tu-spacing-lg);
}

/* === Forms === */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--tu-spacing-md);
}

.form--inline {
    display: inline-flex;
    align-items: flex-end;
    gap: var(--tu-spacing-sm);
    flex-wrap: wrap;
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--tu-spacing-xs);
    position: relative;
}

.form__group--checkbox {
    flex-direction: row;
    align-items: center;
}

.form__label {
    font-size: var(--tu-font-size-sm);
    font-weight: 600;
}

.form__input {
    padding: var(--tu-spacing-sm) var(--tu-spacing-md);
    border: 1px solid var(--tu-color-border);
    border-radius: var(--tu-radius-sm);
    font-family: var(--tu-font-family);
    font-size: var(--tu-font-size);
    background: var(--tu-color-surface);
    width: 100%;
}

.form__input:focus {
    outline: 2px solid var(--tu-color-purple);
    outline-offset: 1px;
    border-color: var(--tu-color-purple);
}

.form__textarea {
    resize: vertical;
    min-height: 200px;
    font-family: monospace;
    font-size: 14px;
}

.form__textarea--small {
    resize: vertical;
    min-height: 80px;
}

.form__actions {
    display: flex;
    gap: var(--tu-spacing-sm);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--tu-spacing-sm) var(--tu-spacing-md);
    border: 1px solid var(--tu-color-border);
    border-radius: var(--tu-radius-sm);
    background: var(--tu-color-surface);
    color: var(--tu-color-text);
    font-family: var(--tu-font-family);
    font-size: var(--tu-font-size-sm);
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s, color 0.2s;
    white-space: nowrap;
}

.btn:hover {
    background-color: var(--tu-color-beige);
}

.btn--primary {
    background-color: var(--tu-color-black);
    color: var(--tu-color-white);
    border-color: var(--tu-color-black);
}

.btn--primary:hover {
    background-color: #333;
}

.btn--danger {
    background-color: var(--tu-color-danger);
    color: var(--tu-color-white);
    border-color: var(--tu-color-danger);
}

.btn--danger:hover {
    background-color: #c0392b;
}

.btn--ghost {
    background: transparent;
    border-color: transparent;
}

.btn--ghost:hover {
    background-color: var(--tu-color-beige);
}

.btn--small {
    padding: var(--tu-spacing-xs) var(--tu-spacing-sm);
    font-size: 0.75rem;
}

.btn--copied {
    background-color: var(--tu-color-green);
    border-color: var(--tu-color-green);
    color: var(--tu-color-black);
}

/* === Dashboard === */
.dashboard__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--tu-spacing-lg);
}

.dashboard__filters {
    margin-bottom: var(--tu-spacing-lg);
}

.dashboard__empty {
    text-align: center;
    color: var(--tu-color-text-muted);
    padding: var(--tu-spacing-xl);
}

.dashboard__empty a {
    color: var(--tu-color-link);
    text-decoration: underline;
}

/* === Search === */
.search-form {
    display: flex;
    gap: var(--tu-spacing-sm);
    margin-bottom: var(--tu-spacing-md);
}

.search-form__input {
    flex: 1;
}

/* === Tags === */
.tag-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--tu-spacing-xs);
}

.tag {
    display: inline-block;
    padding: var(--tu-spacing-xs) var(--tu-spacing-sm);
    background-color: var(--tu-color-purple);
    color: var(--tu-color-black);
    border-radius: var(--tu-radius);
    font-size: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    transition: background-color 0.2s;
}

.tag:hover {
    background-color: #b8a3f0;
}

.tag--active {
    background-color: var(--tu-color-yellow);
}

/* === Tag suggestions === */
.tag-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--tu-color-surface);
    border: 1px solid var(--tu-color-border);
    border-radius: var(--tu-radius-sm);
    z-index: 10;
    display: flex;
    flex-direction: column;
}

.tag-suggestions:empty {
    display: none;
}

.tag-suggestion {
    padding: var(--tu-spacing-sm) var(--tu-spacing-md);
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    font-family: var(--tu-font-family);
    font-size: var(--tu-font-size-sm);
}

.tag-suggestion:hover {
    background-color: var(--tu-color-beige);
}

/* === Prompt cards === */
.prompt-grid {
    display: grid;
    gap: var(--tu-spacing-md);
}

.prompt-card {
    background: var(--tu-color-surface);
    border: 1px solid var(--tu-color-border);
    border-radius: var(--tu-radius);
    padding: var(--tu-spacing-lg);
}

.prompt-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--tu-spacing-md);
    margin-bottom: var(--tu-spacing-sm);
}

.prompt-card__title {
    font-size: var(--tu-font-size-lg);
    font-weight: 600;
}

.prompt-card__actions {
    display: flex;
    gap: var(--tu-spacing-xs);
    flex-shrink: 0;
}

.prompt-card__description {
    color: var(--tu-color-text-muted);
    font-size: var(--tu-font-size-sm);
    margin-bottom: var(--tu-spacing-sm);
}

.prompt-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--tu-spacing-xs);
}

/* === Table === */
.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--tu-color-surface);
    border-radius: var(--tu-radius);
    overflow: hidden;
}

.table th,
.table td {
    padding: var(--tu-spacing-sm) var(--tu-spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--tu-color-border);
    font-size: var(--tu-font-size-sm);
}

.table th {
    background-color: var(--tu-color-black);
    color: var(--tu-color-white);
    font-weight: 600;
}

/* === Modal (dialog) === */
.modal {
    border: none;
    border-radius: 8px;
    padding: 0;
    max-width: 700px;
    width: 90%;
    max-height: 80vh;
    margin: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.modal::backdrop {
    background-color: rgba(0, 0, 0, 0.5);
}

.modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--tu-spacing-md) var(--tu-spacing-lg);
    border-bottom: 1px solid var(--tu-color-border);
}

.modal__title {
    font-size: var(--tu-font-size-lg);
    margin: 0;
}

.modal__close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--tu-spacing-xs);
    color: var(--tu-color-text-muted);
}

.modal__close:hover {
    color: var(--tu-color-black);
}

.modal__body {
    padding: var(--tu-spacing-lg);
    margin: 0;
    font-family: monospace;
    font-size: 14px;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-y: auto;
    max-height: calc(80vh - 130px);
}

.modal__footer {
    padding: var(--tu-spacing-md) var(--tu-spacing-lg);
    border-top: 1px solid var(--tu-color-border);
}

/* === Responsive === */
@media (min-width: 640px) {
    .prompt-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}