/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #6b7280;
    --secondary-hover: #4b5563;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f9fafb;
    --card-bg: #f0eee9;
    --border-color: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.2s ease-in-out;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: #E3E0D7;
    min-height: 100vh;
}

/* Header */
header {
    position: relative;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    margin-top: 4rem;
    color: var(--text-primary);
    max-width: 52rem;
    margin-left: auto;
    margin-right: auto;
}

.last-updated {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.tournaments-link {
    position: absolute;
    top: 1rem;
    left: 1rem;
    margin-top: 1.5rem;
    padding: 0.5rem 0.875rem;
    background-color: #164F1A;
    color: #ffffff;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
    transition: opacity 0.2s ease-in-out;
}

.tournaments-link:hover {
    opacity: 0.9;
}

.tournaments-link:focus-visible {
    outline: 2px solid #164F1A;
    outline-offset: 2px;
}

/* Main Content */
.card-logo {
  position: absolute;
  top: 16px;
  left: 100%;
  transform: translateX(-110%);
  width: 128px;
  height: auto;
}
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Intro / Description */
.intro {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.25rem 1.25rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.intro p + p {
    margin-top: 0.75rem;
}

.intro__lead {
    font-weight: 700;
    font-size: 1.125rem;
}

.intro__rules a {
    color: var(--primary-color);
    font-weight: 600;
}

.intro__rules a:hover {
    color: var(--primary-hover);
}

.intro__closing {
    margin-top: 0.9rem;
}

.details {
    margin-top: 1rem;
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem;
}

.details__title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.details__list {
    display: grid;
    gap: 0.5rem;
}

.details__row {
    display: grid;
    grid-template-columns: 7.5rem 1fr;
    gap: 0.75rem;
    align-items: baseline;
}

.details__row dt {
    color: var(--text-secondary);
    font-weight: 600;
}

.details__row dd {
    margin: 0;
}

/* Loading State */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

/* Error State */
.error {
    background-color: var(--error-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.error[hidden] {
    display: none;
}

#error-message {
    flex: 1;
}

/* Bracket Container */
.bracket-container {
    animation: fadeIn 0.3s ease-in;
    position: relative;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.round {
    margin-bottom: 2rem;
}

.round__title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.matches-container {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* Match Card */
.match-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.match-card:hover {
    box-shadow: var(--shadow-lg);
}

.match-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.match-card__id {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

.match-card__time {
    font-size: 1.125rem;
    color: var(--primary-color);
    font-weight: 700;
}

.match-card__players {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Player Slot */
.player-slot {
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
    transition: var(--transition);
    background-color: var(--bg-color);
    cursor: default;
}

.player-slot--filled {
    background-color: #f3f4f6;
    border-color: #d1d5db;
}

.player-slot--open {
    cursor: pointer;
    border-color: var(--success-color);
    border-style: dashed;
}

.player-slot--open:hover:not(.player-slot--disabled) {
    background-color: #f3f4f6;
    border-color: var(--primary-color);
    border-style: solid;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.player-slot--disabled {
    cursor: default;
    opacity: 0.7;
}

.player-slot__name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.player-slot__elo {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.player-slot__placeholder {
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 0.9375rem;
    text-align: center;
}

/* Buttons */
.button {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.button:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.button--primary {
    background-color: var(--primary-color);
    color: white;
}

.button--primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

.button--secondary {
    background-color: var(--secondary-color);
    color: white;
}

.button--secondary:hover:not(:disabled) {
    background-color: var(--secondary-hover);
}

.button__spinner {
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal[hidden] {
    display: none;
}

.modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.2s ease-in;
}

.modal__content {
    position: relative;
    background-color: var(--card-bg);
    border-radius: 0.75rem;
    padding: 2rem;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease-out;
    z-index: 1;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal__close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.25rem;
    transition: var(--transition);
    padding: 0;
}

.modal__close:hover {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

.modal__close:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.modal__title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

/* Form */
.signup-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group--checkbox {
    gap: 0;
}

.form-label {
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.form-note {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: -0.35rem;
}

.required {
    color: var(--error-color);
}

.form-input {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--card-bg);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input:invalid:not(:focus):not(:placeholder-shown) {
    border-color: var(--error-color);
}

.form-checkbox {
    display: flex;
    gap: 0.625rem;
    align-items: flex-start;
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.45;
}

.form-checkbox input[type="checkbox"] {
    margin-top: 0.2rem;
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary-color);
    flex-shrink: 0;
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 0.5rem;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-primary);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    animation: slideUp 0.3s ease-out;
    max-width: 90%;
}

.toast[hidden] {
    display: none;
}

.toast--success {
    background-color: var(--success-color);
}

.toast--error {
    background-color: var(--error-color);
}

.toast__message {
    font-size: 0.9375rem;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 640px) {
    header h1 {
        font-size: 1.5rem;
    }

    header {
        padding-top: 2.75rem;
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .tournaments-link {
        top: 0.75rem;
        left: 0.75rem;
        padding: 0.5rem 0.75rem;
        font-size: 0.8125rem;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }

    main {
        padding: 1rem 0.75rem;
    }

    .intro {
        padding: 1rem;
    }

    .details__row {
        grid-template-columns: 6.5rem 1fr;
    }

    .matches-container {
        grid-template-columns: 1fr;
    }

    .match-card {
        padding: 1.25rem;
    }

    .modal__content {
        padding: 1.5rem;
    }

    .form-actions {
        flex-direction: column-reverse;
    }

    .form-actions .button {
        width: 100%;
    }

    .tournament-full-overlay {
        padding: 1.5rem 1rem;
    }

    .tournament-full-overlay__title {
        font-size: 1.5rem;
    }

    .tournament-full-overlay__message {
        font-size: 1rem;
    }

    .tournament-full-overlay__social {
        font-size: 0.9375rem;
    }

    .waitlist-box {
        padding: 1.5rem 1rem;
    }

    .waitlist-box__title {
        font-size: 1.25rem;
    }

    .review-card__row {
        grid-template-columns: 7rem 1fr;
        gap: 0.75rem;
    }

    .confirmation-card__row {
        grid-template-columns: 7rem 1fr;
        gap: 0.75rem;
    }
}

@media (min-width: 641px) and (max-width: 1024px) {
    .matches-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Tournament Full Overlay */
.tournament-full-overlay {
    position: relative;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.95) 0%, rgba(29, 78, 216, 0.95) 100%);
    color: white;
    padding: 2rem;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
    animation: fadeIn 0.3s ease-in;
}

.tournament-full-overlay[hidden] {
    display: none;
}

.tournament-full-overlay__content {
    text-align: center;
}

.tournament-full-overlay__title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
}

.tournament-full-overlay__message {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.tournament-full-overlay__social {
    font-size: 1rem;
    line-height: 1.6;
}

.tournament-full-overlay__social a {
    color: white;
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: opacity 0.2s ease-in-out;
}

.tournament-full-overlay__social a:hover {
    opacity: 0.9;
}

/* Waitlist Box */
.waitlist-box {
    background-color: var(--card-bg);
    border: 2px solid var(--warning-color);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    animation: fadeIn 0.3s ease-in;
}

.waitlist-box[hidden] {
    display: none;
}

.waitlist-box__content {
    text-align: center;
}

.waitlist-box__title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.waitlist-box__message {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.waitlist-box__count {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.waitlist-box__count-label {
    color: var(--text-secondary);
}

.waitlist-box__count-number {
    color: var(--error-color);
    font-weight: 700;
    font-size: 1.25rem;
}

/* Review Card */
.review-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.review-card__row {
    display: grid;
    grid-template-columns: 8rem 1fr;
    gap: 1rem;
    align-items: baseline;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.review-card__row:last-of-type {
    border-bottom: none;
}

.review-card__row[hidden] {
    display: none;
}

.review-card__label {
    font-weight: 600;
    color: var(--text-secondary);
}

.review-card__value {
    color: var(--text-primary);
    font-weight: 500;
}

.review-card__warning {
    background-color: #fef3c7;
    border: 1px solid #fbbf24;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    color: #92400e;
    font-size: 0.875rem;
    margin: 0.5rem 0;
}

.review-card__warning[hidden] {
    display: none;
}

.review-card__actions {
    display: flex;
    gap: 0.75rem;
    justify-content: space-between;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.review-card__actions .button {
    flex: 1;
}

/* Confirmation Card */
.confirmation-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.confirmation-card__success-icon {
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    background-color: var(--success-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.confirmation-card__message {
    font-size: 1.125rem;
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
}

.confirmation-card__details {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    background-color: var(--bg-color);
    border-radius: 0.5rem;
    padding: 1.25rem;
    margin-top: 0.5rem;
}

.confirmation-card__row {
    display: grid;
    grid-template-columns: 8rem 1fr;
    gap: 1rem;
    align-items: baseline;
    text-align: left;
}

.confirmation-card__row[hidden] {
    display: none;
}

.confirmation-card__label {
    font-weight: 600;
    color: var(--text-secondary);
}

.confirmation-card__value {
    color: var(--text-primary);
    font-weight: 500;
}

.confirmation-card__warning {
    background-color: #fef3c7;
    border: 1px solid #fbbf24;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    color: #92400e;
    font-size: 0.875rem;
    text-align: left;
    margin: 0.5rem 0;
}

.confirmation-card__warning[hidden] {
    display: none;
}

.confirmation-card__actions {
    width: 100%;
    margin-top: 0.5rem;
}

.confirmation-card__actions .button {
    width: 100%;
}

/* Focus visible styles for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}