@import url('https://fonts.googleapis.com/css2?family=Anton&family=DM+Sans:wght@400;500;600;700&display=swap');

:root {
    color-scheme: light;
    --ink: #24212b;
    --muted: #77727f;
    --accent: #7553d6;
    --accent-dark: #5e3fc0;
    --accent-soft: #f0ebfc;
    --surface: #fff;
    --page: #f6f4f9;
    --field: #fcfbfd;
    --border: #e8e4ee;
    --disabled: #c9c4d2;
    --disabled-surface: #eeebf2;
    --disabled-ink: #8f8998;
    --subtle: #938d9b;
    --glow-one: rgba(217, 202, 255, 0.38);
    --glow-two: rgba(255, 218, 230, 0.3);
    --container-border: rgba(255, 255, 255, 0.9);
    --header-surface: rgba(255, 255, 255, 0.94);
    --header-photo-surface: rgba(255, 255, 255, 0.88);
    --card-photo-surface: rgba(255, 255, 255, 0.91);
    --photo-overlay: rgba(246, 244, 249, 0.42);
    --focus-ring: rgba(117, 83, 214, 0.45);
    --input-focus-shadow: rgba(117, 83, 214, 0.13);
    --button-hover-shadow: rgba(94, 63, 192, 0.22);
    --card-shadow: 0 8px 24px rgba(44, 31, 75, 0.06);
    --shadow: 0 20px 60px rgba(44, 31, 75, 0.1);
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --ink: #f4f2f8;
    --muted: #b2adbd;
    --accent: #7553d6;
    --accent-dark: #c4b5fd;
    --accent-soft: #30264a;
    --surface: #22212a;
    --page: #17161d;
    --field: #2b2933;
    --border: #403d49;
    --disabled: #403d49;
    --disabled-surface: #35323d;
    --disabled-ink: #a49eae;
    --subtle: #a49eae;
    --glow-one: rgba(117, 83, 214, 0.14);
    --glow-two: rgba(66, 46, 108, 0.12);
    --container-border: rgba(255, 255, 255, 0.08);
    --header-surface: rgba(34, 33, 42, 0.96);
    --header-photo-surface: rgba(34, 33, 42, 0.9);
    --card-photo-surface: rgba(34, 33, 42, 0.94);
    --photo-overlay: rgba(23, 22, 29, 0.42);
    --focus-ring: rgba(167, 139, 250, 0.7);
    --input-focus-shadow: rgba(167, 139, 250, 0.2);
    --button-hover-shadow: rgba(117, 83, 214, 0.28);
    --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
}

:root[data-theme="blue-mint"] {
    --ink: #17324d;
    --muted: #557080;
    --accent: #168aad;
    --accent-dark: #116b88;
    --accent-soft: #d8f3ed;
    --surface: #fff;
    --page: #effaf7;
    --field: #f5fcfa;
    --border: #cce7df;
    --disabled: #c5d8d3;
    --disabled-surface: #e4eeeb;
    --disabled-ink: #617a73;
    --subtle: #718b86;
    --glow-one: rgba(90, 200, 180, 0.2);
    --glow-two: rgba(106, 178, 230, 0.18);
    --container-border: rgba(255, 255, 255, 0.9);
    --header-surface: rgba(255, 255, 255, 0.94);
    --header-photo-surface: rgba(255, 255, 255, 0.88);
    --card-photo-surface: rgba(255, 255, 255, 0.92);
    --photo-overlay: rgba(239, 250, 247, 0.42);
    --focus-ring: rgba(22, 138, 173, 0.55);
    --input-focus-shadow: rgba(22, 138, 173, 0.17);
    --button-hover-shadow: rgba(17, 107, 136, 0.22);
    --card-shadow: 0 8px 24px rgba(23, 70, 80, 0.08);
    --shadow: 0 20px 60px rgba(23, 70, 80, 0.1);
}

:root[data-theme="red-black"] {
    color-scheme: dark;
    --ink: #f5f5f5;
    --muted: #b7b7b7;
    --accent: #d52e3b;
    --accent-dark: #ff5964;
    --accent-soft: #402126;
    --surface: #242424;
    --page: #171717;
    --field: #2e2e2e;
    --border: #444;
    --disabled: #4b3b3d;
    --disabled-surface: #393939;
    --disabled-ink: #aaa;
    --subtle: #aaa;
    --glow-one: rgba(230, 57, 70, 0.12);
    --glow-two: rgba(100, 20, 28, 0.1);
    --container-border: rgba(255, 255, 255, 0.08);
    --header-surface: rgba(36, 36, 36, 0.96);
    --header-photo-surface: rgba(36, 36, 36, 0.9);
    --card-photo-surface: rgba(36, 36, 36, 0.94);
    --photo-overlay: rgba(23, 23, 23, 0.42);
    --focus-ring: rgba(255, 89, 100, 0.7);
    --input-focus-shadow: rgba(255, 89, 100, 0.2);
    --button-hover-shadow: rgba(213, 46, 59, 0.25);
    --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.24);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
}

:root[data-theme="blue-shades"] {
    --ink: #142b4a;
    --muted: #5e718b;
    --accent: #2864c5;
    --accent-dark: #1d4f9e;
    --accent-soft: #e1ecff;
    --surface: #fff;
    --page: #f1f6ff;
    --field: #f8faff;
    --border: #d5e1f3;
    --disabled: #c8d3e3;
    --disabled-surface: #e8edf5;
    --disabled-ink: #65748a;
    --subtle: #7e8ba0;
    --glow-one: rgba(102, 153, 235, 0.2);
    --glow-two: rgba(180, 210, 255, 0.24);
    --container-border: rgba(255, 255, 255, 0.9);
    --header-surface: rgba(255, 255, 255, 0.96);
    --header-photo-surface: rgba(255, 255, 255, 0.9);
    --card-photo-surface: rgba(255, 255, 255, 0.93);
    --photo-overlay: rgba(241, 246, 255, 0.42);
    --focus-ring: rgba(40, 100, 197, 0.55);
    --input-focus-shadow: rgba(40, 100, 197, 0.17);
    --button-hover-shadow: rgba(29, 79, 158, 0.22);
    --card-shadow: 0 8px 24px rgba(29, 63, 112, 0.08);
    --shadow: 0 20px 60px rgba(29, 63, 112, 0.1);
}

* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    margin: 0;
    padding: 32px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(ellipse at 15% 10%, var(--glow-one), transparent 36%),
        radial-gradient(ellipse at 90% 90%, var(--glow-two), transparent 34%),
        var(--page);
    color: var(--ink);
    font-family: 'DM Sans', 'Segoe UI', sans-serif;
    text-align: center;
}

.container {
    width: min(100%, 620px);
    padding: clamp(28px, 6vw, 56px);
    border: 1px solid var(--container-border);
    border-radius: 24px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.bracket-container {
    width: min(100%, 800px);
}

h1 {
    margin: 0 0 16px;
    color: var(--ink);
    font-family: 'Anton', Impact, sans-serif;
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 400;
    letter-spacing: 0.025em;
    line-height: 1.05;
    text-transform: uppercase;
}

p {
    margin: 0 0 28px;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.6;
}

label {
    display: block;
    margin-bottom: 12px;
    color: var(--ink);
    font-size: 0.95rem;
    font-weight: 600;
}

input {
    width: 100%;
    min-height: 52px;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--field);
    color: var(--ink);
    font: inherit;
    font-size: 1rem;
    text-align: left;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

input::placeholder {
    color: var(--subtle);
}

input:focus {
    border-color: var(--accent);
    outline: none;
    background: var(--surface);
    box-shadow: 0 0 0 4px var(--input-focus-shadow);
}

#categories {
    display: block;
    width: 160px;
    margin: 0 auto 16px;
    text-align: center;
}

#startButton {
    margin-bottom: 16px;
}

button {
    min-height: 48px;
    padding: 12px 22px;
    border: 0;
    border-radius: 12px;
    background: var(--accent);
    color: #fff;
    font: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

button:hover:not(:disabled) {
    transform: translateY(-1px);
    background: var(--accent-dark);
    box-shadow: 0 8px 18px var(--button-hover-shadow);
}

button:focus-visible,
a:focus-visible {
    outline: 3px solid var(--focus-ring);
    outline-offset: 3px;
}

button:disabled {
    background: var(--disabled);
    cursor: not-allowed;
}

.page-description {
    margin: 0 0 28px;
}

.tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.tabs button {
    min-height: 42px;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 600;
}

.tabs button:hover:not(:disabled) {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent-dark);
    box-shadow: none;
}

.tabs button[aria-selected="true"] {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
}

.tabs button[aria-selected="true"]:hover {
    background: var(--accent-dark);
    color: #fff;
}

.tab-panel {
    padding: clamp(20px, 5vw, 36px);
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--field);
}

.tab-panel[hidden] {
    display: none;
}

.tab-panel label {
    margin-bottom: 12px;
}

.tab-panel input {
    max-width: 440px;
}

.team-count-label {
    margin-top: 24px;
}

.team-mode-label {
    margin-top: 24px;
}

.team-mode-select {
    width: 100%;
    max-width: 440px;
    min-height: 48px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--field);
    color: var(--ink);
    font: inherit;
    font-size: 1rem;
}

.team-mode-select:focus-visible {
    border-color: var(--accent);
    outline: 3px solid var(--focus-ring);
    outline-offset: 2px;
}

.team-roster {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
    gap: 0 16px;
    margin-top: 20px;
}

.team-roster[hidden] {
    display: none;
}

.team-roster-heading {
    grid-column: 1 / -1;
    margin: 0 0 16px;
    color: var(--muted);
    font-size: 0.95rem;
}

.team-roster label {
    margin-bottom: 8px;
}

#generateBracketButton {
    margin-top: 20px;
}

.back-link {
    display: inline-block;
    margin-top: 24px;
    color: var(--accent-dark);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
}

.back-link:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.theme-control {
    display: flex;
    align-items: center;
    gap: 10px;
    text-align: left;
}

.theme-control label {
    margin: 0;
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 600;
}

.theme-control select {
    min-height: 38px;
    max-width: 100%;
    padding: 7px 32px 7px 10px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--field);
    color: var(--ink);
    font: inherit;
    font-size: 0.82rem;
}

.theme-control select:focus-visible {
    border-color: var(--accent);
    outline: 3px solid var(--focus-ring);
    outline-offset: 2px;
}

.container > .theme-control {
    justify-content: flex-end;
    margin: 0 0 20px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.tournament-page {
    display: block;
    min-height: 100vh;
    padding: 0;
    text-align: left;
}

.tournament-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.tournament-header {
    padding: 20px clamp(16px, 4vw, 48px) 24px;
    border-bottom: 1px solid var(--border);
    background: var(--header-surface);
}

.tournament-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
}

.tournament-header h1 {
    margin: 0;
    font-size: clamp(2rem, 5vw, 3.25rem);
    text-align: center;
}

.tournament-back-link {
    margin: 0;
}

.tournament-tabs {
    margin: 0 0 14px;
}

.tournament-summary {
    margin: 0 0 8px;
    font-size: 0.85rem;
    text-align: center;
}

.setup-background {
    margin: 0 0 24px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--field);
}

.setup-background h2 {
    margin: 0 0 12px;
    color: var(--ink);
    font-size: 1rem;
}

.setup-background h2 span {
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 500;
}

.setup-background-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.setup-photo-button {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 9px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--accent-dark);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
}

.setup-photo-button:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.setup-photo-button:focus-within {
    outline: 3px solid var(--focus-ring);
    outline-offset: 3px;
}

.setup-photo-remove {
    min-height: 40px;
    margin: 0;
    padding: 9px 14px;
    border-radius: 10px;
    font-size: 0.85rem;
}

.setup-photo-remove[hidden] {
    display: none;
}

.setup-background-status {
    margin: 12px 0 0;
    font-size: 0.8rem;
    text-align: center;
}

.setup-background-status:empty {
    display: none;
}

.tournament-page.has-background-photo {
    background-image:
        linear-gradient(var(--photo-overlay), var(--photo-overlay)),
        var(--tournament-background-photo);
    background-attachment: fixed;
    background-position: center;
    background-size: cover;
}

.has-background-photo .tournament-header {
    background: var(--header-photo-surface);
}

.has-background-photo .match-card {
    background: var(--card-photo-surface);
    backdrop-filter: blur(6px);
}

.bracket-rounds {
    flex: 1;
    min-height: 560px;
    display: grid;
    grid-template-columns:
        minmax(calc(var(--side-round-count, 1) * 125px), 1fr)
        minmax(200px, 240px)
        minmax(calc(var(--side-round-count, 1) * 125px), 1fr);
    align-items: stretch;
    gap: 16px;
    padding: 30px clamp(16px, 4vw, 48px);
    overflow: auto;
}

.bracket-rounds.bracket-single-final {
    grid-template-columns: minmax(260px, 420px);
    justify-content: center;
}

.bracket-side {
    min-width: 0;
    display: flex;
    align-items: stretch;
}

.bracket-side-right {
    flex-direction: row-reverse;
}

.bracket-final {
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    transform: translateY(48px);
}

#finalMatch {
    width: 100%;
}

.bracket-final .bracket-round {
    width: 100%;
}

.third-place-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    color: var(--subtle);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    opacity: 0.78;
}

.third-place-toggle input {
    width: 16px;
    min-height: 16px;
    margin: 0;
    padding: 0;
    accent-color: var(--accent);
    cursor: pointer;
}

.third-place-toggle input:disabled {
    cursor: not-allowed;
}

.third-place-toggle:has(input:disabled) {
    cursor: not-allowed;
    opacity: 0.7;
}

.third-place-round {
    width: 100%;
}

.third-place-round[hidden] {
    display: none;
}

.third-place-team-name {
    min-width: 0;
    overflow: hidden;
    color: var(--muted);
    font-size: 0.84rem;
    text-overflow: ellipsis;
    transition: color 0.18s ease;
    white-space: nowrap;
}

.third-place-team-name.is-winner {
    color: var(--accent-dark);
    font-weight: 700;
}

.bracket-round {
    min-width: 125px;
    flex: 1 1 230px;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.round-matches {
    flex: 1;
    display: grid;
    grid-template-rows: repeat(var(--side-row-count), minmax(0, 1fr));
    align-items: center;
    min-height: 0;
}

.match-card {
    grid-row: span var(--match-span, 1);
    align-self: center;
    width: 100%;
    min-height: 124px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin: 0;
    padding: 8px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface);
    box-shadow: var(--card-shadow);
}

.bracket-team-row {
    min-height: 44px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px;
    border-bottom: 1px solid var(--border);
}

.bracket-team-row:last-child {
    border-bottom: 0;
}

.bracket-team-row.is-winner {
    color: var(--accent-dark);
    font-weight: 700;
}

.team-name-input {
    min-width: 0;
    min-height: 36px;
    padding: 7px 9px;
    border-radius: 8px;
    font-size: 0.84rem;
}

.winner-choice {
    min-width: 32px;
    min-height: 32px;
    margin-left: auto;
    padding: 5px;
    border-radius: 8px;
    font-size: 0.85rem;
    white-space: nowrap;
}

.winner-choice:disabled {
    background: var(--disabled-surface);
    color: var(--disabled-ink);
    cursor: default;
}

.bracket-team-row.is-winner .winner-choice {
    background: var(--accent-soft);
    color: var(--accent-dark);
}

.bye-label {
    color: var(--subtle);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    transition: color 0.18s ease;
}

.bracket-team-row.is-winner .bye-label {
    color: var(--accent-dark);
}

.auto-advance-label {
    margin-left: auto;
    color: var(--accent-dark);
    font-size: 0.7rem;
    font-weight: 700;
}

.auto-advance-label[hidden] {
    display: none;
}

@media (max-width: 480px) {
    body {
        padding: 18px 14px;
    }

    .container {
        border-radius: 18px;
    }

    .tabs {
        gap: 8px;
    }

    .tabs button {
        padding: 9px 13px;
        font-size: 0.82rem;
    }

    .bracket-rounds {
        gap: 10px;
    }

    .bracket-round {
        min-width: 115px;
        flex-basis: 115px;
    }

    .bracket-rounds:not(.bracket-single-final) {
        grid-template-columns:
            minmax(calc(var(--side-round-count, 1) * 115px), 1fr)
            minmax(180px, 220px)
            minmax(calc(var(--side-round-count, 1) * 115px), 1fr);
    }

    .bracket-round {
        min-width: 115px;
        flex-basis: 115px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}