/* ================================================================
   Stack Attack Hannover — Dark Theme
   Basis: CSS Custom Properties + Mobile First
   ================================================================ */

/* ----------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   ---------------------------------------------------------------- */
:root {
    /* Farben */
    --color-bg:           #1a1a2e;
    --color-bg-card:      #16213e;
    --color-bg-elevated:  #0f3460;
    --color-accent:       #6c63ff;
    --color-accent-hover: #5a52e0;
    --color-danger:       #e74c3c;
    --color-danger-hover: #c0392b;
    --color-success:      #2ecc71;
    --color-warning:      #f39c12;
    --color-waitlist:     #e67e22;

    /* Text */
    --color-text:         #e0e0e0;
    --color-text-muted:   #888;
    --color-text-faint:   #555;

    /* Suits */
    --color-spade:        #a78bfa;
    --color-club:         #6ee7b7;
    --color-heart:        #f87171;
    --color-diamond:      #fbbf24;

    /* Border */
    --color-border:       #0f3460;
    --color-border-light: #1e3a5f;

    /* Abstände */
    --space-xs:  4px;
    --space-sm:  8px;
    --space-md:  16px;
    --space-lg:  24px;
    --space-xl:  32px;
    --space-2xl: 48px;

    /* Typografie */
    --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;
    --text-sm:   13px;
    --text-base: 15px;
    --text-lg:   18px;
    --text-xl:   22px;
    --text-2xl:  28px;

    /* Radius & Shadow */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-card: 0 2px 12px rgba(0,0,0,0.4);
    --shadow-elevated: 0 4px 24px rgba(0,0,0,0.6);

    /* Transitions */
    --transition: 0.2s ease;

    /* Layout */
    --max-width: 1100px;
    --nav-height: 64px;
}

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

html {
    font-size: var(--text-base);
    scroll-behavior: smooth;
}

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

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

a:hover {
    color: var(--color-accent-hover);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ----------------------------------------------------------------
   3. Layout
   ---------------------------------------------------------------- */
#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-main {
    flex: 1;
    padding: var(--space-xl) var(--space-md);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.page-header {
    margin-bottom: var(--space-xl);
}

.page-header h1 {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-text);
}

.page-header p {
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

/* ----------------------------------------------------------------
   4. Header & Navigation
   ---------------------------------------------------------------- */
.site-header {
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--nav-height);
}

.site-header__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

/* Logo */
.site-header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    flex-shrink: 0;
}

.logo__suit {
    font-size: 24px;
    color: var(--color-spade);
}

.logo__name {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text);
}

.logo__sub {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    display: none;
}

@media (min-width: 480px) {
    .logo__sub { display: inline; }
}

/* Nav */
.site-nav {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav__link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.nav__link:hover {
    color: var(--color-text);
    background: var(--color-bg-elevated);
}

.nav__link--active {
    color: var(--color-accent);
    background: rgba(108, 99, 255, 0.12);
}

.nav__icon {
    font-size: 14px;
}

.nav__item--admin .nav__link {
    color: var(--color-warning);
}

/* User-Bereich */
.nav__user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    border-left: 1px solid var(--color-border);
    padding-left: var(--space-md);
}

.nav__user-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav__user-name {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
}

.nav__badge {
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav__badge--admin {
    background: rgba(108, 99, 255, 0.2);
    color: var(--color-accent);
}

.nav__badge--mod {
    background: rgba(243, 156, 18, 0.2);
    color: var(--color-warning);
}

.nav__user-links {
    display: flex;
    gap: var(--space-md);
}

.nav__user-link {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.nav__user-link:hover {
    color: var(--color-text);
}

.nav__user-link--logout {
    color: var(--color-danger);
}

.nav__user-link--logout:hover {
    color: var(--color-danger-hover);
}

/* Hamburger */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: var(--space-sm);
    cursor: pointer;
}

.nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

/* Mobile Nav */
@media (max-width: 768px) {
    .nav__toggle {
        display: flex;
    }

    .site-nav {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--color-bg-card);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-md);
        gap: var(--space-md);
    }

    .site-nav.is-open {
        display: flex;
    }

    .nav__list {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-xs);
    }

    .nav__link {
        padding: var(--space-md);
    }

    .nav__user {
        border-left: none;
        border-top: 1px solid var(--color-border);
        padding-left: 0;
        padding-top: var(--space-md);
        flex-direction: column;
        align-items: flex-start;
    }

    .logo__sub {
        display: none;
    }
}

/* ----------------------------------------------------------------
   5. Footer
   ---------------------------------------------------------------- */
.site-footer {
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    padding: var(--space-xl) var(--space-md);
    margin-top: auto;
}

.site-footer__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    text-align: center;
}

.site-footer__brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
}

.site-footer__nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
}

.site-footer__nav a {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.site-footer__nav a:hover {
    color: var(--color-text);
}

.site-footer__copy {
    font-size: var(--text-sm);
    color: var(--color-text-faint);
}

/* ----------------------------------------------------------------
   6. Cards
   ---------------------------------------------------------------- */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-card);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
    border-color: var(--color-border-light);
    box-shadow: var(--shadow-elevated);
}

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

.card__title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text);
}

.card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    margin-bottom: var(--space-md);
}

.card__meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

/* Event Cards Grid */
.event-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

@media (min-width: 640px) {
    .event-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .event-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ----------------------------------------------------------------
   7. Event Card — spezifisch
   ---------------------------------------------------------------- */
.event-card {
    position: relative;
    cursor: pointer;
}

.event-card__type-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.event-card__type-badge--tournament {
    background: rgba(108, 99, 255, 0.2);
    color: var(--color-accent);
}

.event-card__type-badge--cashgame {
    background: rgba(46, 204, 113, 0.2);
    color: var(--color-success);
}

.event-card__date {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.event-card__name {
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.event-card--cancelled {
    opacity: 0.5;
}

.event-card--cancelled .event-card__name::after {
    content: ' — ABGESAGT';
    color: var(--color-danger);
    font-size: var(--text-sm);
}

/* Seats Bar */
.seats-bar {
    margin: var(--space-md) 0;
}

.seats-bar__label {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.seats-bar__track {
    height: 6px;
    background: var(--color-bg-elevated);
    border-radius: 3px;
    overflow: hidden;
}

.seats-bar__fill {
    height: 100%;
    background: var(--color-accent);
    border-radius: 3px;
    transition: width 0.4s ease;
}

.seats-bar__fill--full {
    background: var(--color-danger);
}

.seats-bar__fill--almost {
    background: var(--color-warning);
}

/* ----------------------------------------------------------------
   8. Buttons
   ---------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 10px var(--space-lg);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: 600;
    border: none;
    transition: all var(--transition);
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
}

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

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

.btn--primary:hover:not(:disabled) {
    background: var(--color-accent-hover);
    color: #fff;
}

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

.btn--danger:hover:not(:disabled) {
    background: var(--color-danger-hover);
    color: #fff;
}

.btn--ghost {
    background: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

.btn--ghost:hover:not(:disabled) {
    background: var(--color-bg-elevated);
    color: var(--color-text);
}

.btn--success {
    background: var(--color-success);
    color: #fff;
}

.btn--sm {
    padding: 6px var(--space-md);
    font-size: var(--text-sm);
}

.btn--lg {
    padding: 14px var(--space-xl);
    font-size: var(--text-lg);
}

.btn--full {
    width: 100%;
}

/* Register Button States */
.btn--register {
    background: var(--color-accent);
    color: #fff;
}

.btn--register:hover:not(:disabled) {
    background: var(--color-accent-hover);
}

.btn--unregister {
    background: transparent;
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
}

.btn--unregister:hover:not(:disabled) {
    background: var(--color-danger);
    color: #fff;
}

.btn--waitlist {
    background: transparent;
    color: var(--color-waitlist);
    border: 1px solid var(--color-waitlist);
    cursor: default;
}

.btn--loading {
    opacity: 0.7;
    pointer-events: none;
}

/* ----------------------------------------------------------------
   9. Forms
   ---------------------------------------------------------------- */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    padding: 10px var(--space-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: var(--text-base);
    transition: border-color var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}

.form-control::placeholder {
    color: var(--color-text-faint);
}

.form-control--error {
    border-color: var(--color-danger);
}

.form-hint {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.form-error {
    font-size: var(--text-sm);
    color: var(--color-danger);
    margin-top: var(--space-xs);
}

.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.form-check input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-accent);
    cursor: pointer;
}

/* Auth-Form Wrapper */
.auth-wrap {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl) var(--space-md);
}

.auth-box {
    width: 100%;
    max-width: 420px;
}

.auth-box__logo {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.auth-box__logo .logo__suit {
    font-size: 40px;
}

.auth-box__logo .logo__name {
    font-size: var(--text-xl);
    display: block;
    margin-top: var(--space-sm);
}

.auth-box__card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-elevated);
}

.auth-box__title {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-xl);
    text-align: center;
}

.auth-box__footer {
    text-align: center;
    margin-top: var(--space-lg);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ----------------------------------------------------------------
   10. Alerts & Badges
   ---------------------------------------------------------------- */
.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    margin-bottom: var(--space-lg);
    border: 1px solid transparent;
}

.alert--success {
    background: rgba(46, 204, 113, 0.1);
    border-color: rgba(46, 204, 113, 0.3);
    color: var(--color-success);
}

.alert--error {
    background: rgba(231, 76, 60, 0.1);
    border-color: rgba(231, 76, 60, 0.3);
    color: var(--color-danger);
}

.alert--warning {
    background: rgba(243, 156, 18, 0.1);
    border-color: rgba(243, 156, 18, 0.3);
    color: var(--color-warning);
}

.alert--info {
    background: rgba(108, 99, 255, 0.1);
    border-color: rgba(108, 99, 255, 0.3);
    color: var(--color-accent);
}

.badge {
    display: inline-flex;
    align-items: center;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge--registered {
    background: rgba(46, 204, 113, 0.15);
    color: var(--color-success);
}

.badge--waitlist {
    background: rgba(230, 126, 34, 0.15);
    color: var(--color-waitlist);
}

.badge--cancelled {
    background: rgba(231, 76, 60, 0.15);
    color: var(--color-danger);
}

/* ----------------------------------------------------------------
   11. Teilnehmerliste (Drawer)
   ---------------------------------------------------------------- */
.participants-drawer {
    margin-top: var(--space-md);
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-md);
    display: none;
}

.participants-drawer.is-open {
    display: block;
}

.participants-drawer__title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-sm);
}

.participants-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.participants-list__item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--text-sm);
    padding: var(--space-xs) 0;
}

.participants-list__name {
    color: var(--color-text);
}

.participants-list__pos {
    color: var(--color-text-faint);
    font-size: 11px;
    min-width: 20px;
}

.participants-toggle {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
    transition: color var(--transition);
}

.participants-toggle:hover {
    color: var(--color-text);
}

/* ----------------------------------------------------------------
   12. Filter Bar
   ---------------------------------------------------------------- */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    align-items: center;
}

.filter-btn {
    padding: 6px var(--space-md);
    border-radius: 20px;
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.filter-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.filter-btn.is-active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

/* ----------------------------------------------------------------
   13. Tables (Admin)
   ---------------------------------------------------------------- */
.table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

thead th {
    background: var(--color-bg-elevated);
    padding: var(--space-md);
    text-align: left;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 11px;
    white-space: nowrap;
}

tbody td {
    padding: var(--space-md);
    border-top: 1px solid var(--color-border);
    color: var(--color-text);
    vertical-align: middle;
}

tbody tr:hover td {
    background: rgba(108, 99, 255, 0.04);
}

/* ----------------------------------------------------------------
   14. Utility Classes
   ---------------------------------------------------------------- */
.text-muted   { color: var(--color-text-muted); }
.text-faint   { color: var(--color-text-faint); }
.text-accent  { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-danger  { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.text-sm      { font-size: var(--text-sm); }
.text-center  { text-align: center; }
.text-bold    { font-weight: 700; }

.mt-sm  { margin-top: var(--space-sm); }
.mt-md  { margin-top: var(--space-md); }
.mt-lg  { margin-top: var(--space-lg); }
.mt-xl  { margin-top: var(--space-xl); }
.mb-md  { margin-bottom: var(--space-md); }
.mb-lg  { margin-bottom: var(--space-lg); }
.mb-xl  { margin-bottom: var(--space-xl); }

.flex        { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-sm      { gap: var(--space-sm); }
.gap-md      { gap: var(--space-md); }

.hidden      { display: none !important; }
.sr-only     {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Suit Colors */
.suit-spade   { color: var(--color-spade); }
.suit-club    { color: var(--color-club); }
.suit-heart   { color: var(--color-heart); }
.suit-diamond { color: var(--color-diamond); }

/* ----------------------------------------------------------------
   15. Loading Spinner
   ---------------------------------------------------------------- */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ----------------------------------------------------------------
   16. Empty State
   ---------------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-md);
    color: var(--color-text-muted);
}

.empty-state__icon {
    font-size: 48px;
    margin-bottom: var(--space-md);
    opacity: 0.4;
}

.empty-state__text {
    font-size: var(--text-lg);
    margin-bottom: var(--space-sm);
}

.empty-state__sub {
    font-size: var(--text-sm);
    color: var(--color-text-faint);
}

/* ----------------------------------------------------------------
   Logo-Bild
   ---------------------------------------------------------------- */
.logo__img {
    height: 44px;
    width:  44px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.logo__name {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text);
}

.logo__sub {
    font-size: 11px;
    font-weight: 400;
    color: var(--color-text-muted);
}

/* Logout-Button in Nav wie Link aussehen lassen */
.nav__user-link[type="submit"],
form .nav__user-link {
    background: none;
    border: none;
    cursor: pointer;
    font-size: var(--text-sm);
    padding: 0;
    font-family: inherit;
}