/* =============================================
   Diktat App  Shared Base Styles
   ============================================= */

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

:root {
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-success: #16a34a;
    --color-danger: #dc2626;
    --color-warning: #f59e0b;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --color-gap-easy: #bbf7d0;
    --color-gap-easy-text: #166534;
    --color-gap-medium: #bfdbfe;
    --color-gap-medium-text: #1e40af;
    --color-gap-hard: #fecaca;
    --color-gap-hard-text: #991b1b;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.1);
    --shadow-lg: 0 4px 12px rgba(0,0,0,.1);
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

/* -- Lucide Icons -- */
.lucide {
    width: 1em;
    height: 1em;
    vertical-align: -0.125em;
    flex-shrink: 0;
}

/* -- Header -- */
.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    height: 60px;
    overflow: hidden;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    position: relative;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: .5rem;
    text-decoration: none;
    height: 60px;
}

.nav-logo {
    height: 40px;
    width: auto;
}

.nav-brand-text {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    pointer-events: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: .75rem;
}

.nav-burger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: .25rem;
    color: var(--color-text);
}
.nav-burger .lucide {
    width: 1.5rem;
    height: 1.5rem;
}

.nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: .875rem;
}
.nav-link:hover {
    color: var(--color-primary);
}

.nav-user {
    font-size: .875rem;
    color: var(--color-text-muted);
}

/* -- Footer -- */
.site-footer {
    margin-top: auto;
    padding: 1.5rem 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: .8rem;
    border-top: 1px solid var(--color-border);
}
.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: .5rem 1.25rem;
    margin-top: .5rem;
}
.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
}
.footer-links a:hover {
    color: var(--color-text);
    text-decoration: underline;
}

/* -- Buttons -- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .5rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: .875rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all .15s;
}
.btn:hover {
    background: var(--color-bg);
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.btn-primary:hover {
    background: var(--color-primary-hover);
}

.btn-sm {
    padding: .3rem .6rem;
    font-size: .8rem;
}
.btn-lg {
    padding: .65rem 1.5rem;
    font-size: 1rem;
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
    border-color: var(--color-danger);
}
.btn-danger:hover {
    background: #b91c1c;
    border-color: #b91c1c;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    cursor: pointer;
    text-decoration: none;
    font-size: .875rem;
    transition: all .15s;
    padding: 0;
    line-height: 1;
    color: var(--color-text);
}
.btn-icon .lucide {
    width: 16px;
    height: 16px;
}
.btn-icon:hover {
    background: var(--color-bg);
    border-color: var(--color-text-muted);
}
.btn-icon-danger .lucide {
    color: var(--color-danger);
}
.btn-icon-danger:hover {
    background: #fef2f2;
    border-color: var(--color-danger);
}

/* -- Hero -- */
.hero {
    text-align: center;
    padding: 3rem 0 2rem;
}
.hero h1 {
    font-size: 2.5rem;
    margin-bottom: .5rem;
}
.hero p {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

/* -- Sections -- */
.section {
    margin: 2rem 0;
}

.about-section h2 {
    margin-top: 2rem;
    margin-bottom: .5rem;
}
.about-section h3 {
    margin-top: 1.5rem;
    margin-bottom: .5rem;
}
.about-section p {
    margin-bottom: .75rem;
    line-height: 1.6;
}
.about-section ul {
    margin: .5rem 0 1rem 1.25rem;
    line-height: 1.6;
}
.about-section li {
    margin-bottom: .5rem;
}

.section-header {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-bottom: 1rem;
}
.section-header h2 {
    margin: 0;
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    margin-bottom: 1rem;
}
.filter-btn {
    padding: .35rem .75rem;
    border-radius: 99px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: .8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all .15s;
}
.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.filter-btn.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1.5rem 0 1rem;
}
.page-header h1 {
    font-size: 1.5rem;
}
.subtitle {
    color: var(--color-text-muted);
    font-size: .9rem;
}

.header-actions {
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
}

.page-actions {
    display: flex;
    gap: .75rem;
    padding: 2rem 0;
}

/* -- Cards -- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    transition: box-shadow .2s, transform .2s, border-color .2s;
}
.card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
    transform: translateY(-2px);
    border-color: var(--color-primary);
}
.card h3 {
    font-size: 1rem;
    margin-bottom: .3rem;
}
.card-meta {
    font-size: .8rem;
    color: var(--color-text-muted);
}
.card-actions {
    margin-top: auto;
    padding-top: .75rem;
}

.card-link {
    position: relative;
    cursor: pointer;
}
.stretched-link::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
}

/* -- Forms -- */
.form-section {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    background: var(--color-surface);
}
.form-section legend {
    font-weight: 600;
    font-size: 1rem;
    padding: 0 .5rem;
}

.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: .3rem;
    font-size: .875rem;
}
.form-group input[type="text"],
.form-group input[type="datetime-local"],
.form-group select {
    width: 100%;
    padding: .5rem .75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: .875rem;
    font-family: var(--font);
}
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}

.form-group-nested {
    margin-top: .5rem;
    padding-left: 1.5rem;
}

.hint {
    font-size: .75rem;
    color: var(--color-text-muted);
}

.form-actions {
    display: flex;
    gap: .75rem;
    padding: 1rem 0;
}

/* -- Error / Messages -- */
.error-message {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius);
    padding: .75rem 1rem;
    box-shadow: var(--shadow-lg);
    max-width: 320px;
    font-size: .875rem;
    z-index: 200;
}

.message-box {
    text-align: center;
    padding: 4rem 1rem;
}
.message-box h2 {
    margin-bottom: .5rem;
}
.message-box p {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}
.message-box .text-muted {
    font-size: 0.875rem;
}

.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--color-text-muted);
}

/* -- Guide Box -- */
.guide-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius);
    padding: .75rem 1rem;
    margin-bottom: 1rem;
    font-size: .875rem;
    line-height: 1.5;
}
.guide-box h3 {
    font-size: .9rem;
    margin: 0 0 .25rem;
    display: flex;
    align-items: center;
    gap: .35rem;
}
.guide-box h3 .lucide {
    color: #3b82f6;
}
.guide-box p {
    margin: 0;
    color: var(--color-text);
}

/* -- Warning Box -- */
.warning-box {
    background: #fef3c7;
    border: 1px solid #fbbf24;
    border-radius: var(--radius);
    padding: .75rem 1rem;
    margin-bottom: 1.25rem;
    font-size: .875rem;
    line-height: 1.5;
    display: flex;
    gap: .75rem;
    align-items: flex-start;
}
.warning-box > .lucide {
    color: #d97706;
    flex-shrink: 0;
    width: 1.25em;
    height: 1.25em;
    margin-top: .1rem;
}
.warning-box p {
    margin: .25rem 0 0;
    color: var(--color-text);
}

/* -- Alerts -- */
.alert {
    padding: .75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-weight: 500;
}
.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}
.alert-success {
    background: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
    display: flex;
    align-items: center;
    gap: .5rem;
}

/* -- Badge -- */
.badge {
    display: inline-block;
    padding: .15rem .5rem;
    border-radius: 99px;
    font-size: .75rem;
    font-weight: 600;
}
.badge-green {
    background: var(--color-gap-easy);
    color: var(--color-gap-easy-text);
}
.badge-draft {
    background: #e5e7eb;
    color: #374151;
}
.badge-published {
    background: var(--color-gap-easy);
    color: var(--color-gap-easy-text);
}
.badge-deleted {
    background: #fecaca;
    color: #991b1b;
}

/* -- Utilities -- */
[x-cloak] { display: none !important; }

/* -- Modal -- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 300;
}
.modal {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
}
.modal-close {
    position: absolute;
    top: .5rem;
    right: .75rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-muted);
    line-height: 1;
    padding: .25rem;
}
.modal-close:hover {
    color: var(--color-text);
}
.modal h2 {
    margin-bottom: .5rem;
}
.modal p {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}
.modal-actions {
    display: flex;
    gap: .5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* -- Responsive -- */
@media (max-width: 768px) {
    .container { padding: 0 1rem; }
    .nav-bar { flex-wrap: wrap; height: 60px; padding: 0; }
    .nav-burger { display: block; }
    .nav-links {
        display: none;
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        gap: 0;
        background: var(--color-surface);
        border-top: 1px solid var(--color-border);
        padding: .5rem 0;
    }
    .nav-links.nav-open { display: flex; }
    .nav-links .nav-link {
        padding: .6rem 1rem;
        font-size: .95rem;
    }
    .nav-links .nav-link:hover {
        background: var(--color-bg);
    }
    .nav-links .btn.btn-sm {
        margin: .25rem 1rem;
        text-align: center;
        justify-content: center;
    }
    .hero h1 { font-size: 1.75rem; }
    .card-grid { grid-template-columns: 1fr; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .site-header { height: auto; overflow: visible; }
}

/* ── Error Page ── */
.error-page {
    max-width: 36rem;
    margin: 4rem auto;
    padding: 0 1rem;
    text-align: center;
}
.error-page-icon .lucide {
    width: 3rem;
    height: 3rem;
    color: var(--color-text-light);
    margin-bottom: 1rem;
}
.error-page h1 { margin-bottom: .5rem; }
.error-page-message { color: var(--color-text-light); margin-bottom: 1.5rem; }
.error-page-code { font-size: .9rem; color: var(--color-text-light); margin-bottom: 1.5rem; }
.error-page .btn { margin-bottom: 2rem; }
.error-page-requestid { font-size: .75rem; color: var(--color-text-light); word-break: break-all; }