:root {
    /* Brand */
    --duck-yellow: #FFD700;
    --duck-orange: #FF8C00;
    --duck-brown: #8B4513;
    --duck-dark: #B8860B;

    /* Surfaces */
    --dark-bg: #1a1a2e;
    --dark-card: #16213e;
    --dark-card-hover: #1a2750;
    --pixel-border: #4a4a6a;

    /* Text — WCAG AA compliant */
    --dark-text: #e0e0e0;
    --text-muted: #a8a8b8;
    --text-dim: #8a8a9a;
    --text-faint: #7a7a8a;
    --text-secondary: #c0c0d0;

    /* Semantic */
    --color-success: #4ade80;
    --color-error: #f87171;
    --color-warning: #fb923c;
    --color-error-bg: #3a1a1a;
    --color-success-bg: #1a3a1a;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.4);

    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal-backdrop: 300;
    --z-modal: 400;
    --z-toast: 500;
    --z-tooltip: 600;

    /* Accent alias */
    --accent: var(--duck-yellow);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Courier New', 'Courier', monospace;
    background-color: var(--dark-bg);
    color: var(--dark-text);
    display: flex;
    flex-direction: column;
}

/* ========== MASCOT ========== */

.mascot {
    display: block;
    margin: 0 auto 12px;
    image-rendering: pixelated;
    width: 140px;
    height: 140px;
}

/* ========== HEADER ========== */

header {
    text-align: center;
    padding: 30px 20px 20px;
    border-bottom: 3px solid var(--pixel-border);
    position: relative;
}

.header-top {
    position: absolute;
    top: 20px;
    right: 20px;
}

header h1 {
    font-size: 3rem;
    color: var(--duck-yellow);
    letter-spacing: 4px;
    text-transform: uppercase;
    text-shadow: 3px 3px 0 #000;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
    letter-spacing: 2px;
}

.description {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 6px;
    font-style: italic;
}

/* ========== AUTH HEADER (login, forgot, reset, invite, visitor) ========== */

.auth-header {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid var(--pixel-border);
}

.header-back {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.header-back:hover {
    color: var(--duck-yellow);
}

.auth-page-title {
    font-size: 1.3rem;
    color: var(--duck-yellow);
    text-align: center;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.auth-page-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 24px;
}

/* ========== MAIN ========== */

main {
    flex: 1;
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 20px;
    width: 100%;
    overflow: hidden;
}

/* ========== CARDS ========== */

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.project-card {
    background: var(--dark-card);
    border: 2px solid var(--pixel-border);
    padding: 24px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
    animation: fadeUp 0.4s ease-out both;
}

.project-card:nth-child(1) { animation-delay: 0.05s; }
.project-card:nth-child(2) { animation-delay: 0.1s; }
.project-card:nth-child(3) { animation-delay: 0.15s; }
.project-card:nth-child(4) { animation-delay: 0.2s; }
.project-card:nth-child(5) { animation-delay: 0.25s; }
.project-card:nth-child(6) { animation-delay: 0.3s; }

.project-card:hover {
    background: var(--dark-card-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.card-title {
    font-size: 1.3rem;
    color: var(--duck-yellow);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.card-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 20px;
    flex: 1;
}

/* Generic card (login, forgot, reset, invite, visitor) */
.card {
    background: var(--dark-card);
    border: 2px solid var(--pixel-border);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-md);
}

.card-centered {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
    padding: 40px 20px;
}

.card-centered .card {
    text-align: center;
}

/* ========== BUTTONS ========== */

.btn {
    font-family: inherit;
    font-size: 0.85rem;
    letter-spacing: 1px;
    padding: 10px 20px;
    border: 2px solid var(--pixel-border);
    cursor: pointer;
    transition: all 0.2s;
    background: transparent;
    color: var(--dark-text);
    text-decoration: none;
    text-align: center;
    display: inline-block;
}

.btn:hover {
    border-color: var(--duck-yellow);
    color: var(--duck-yellow);
}

.btn:focus-visible {
    outline: 2px solid var(--duck-yellow);
    outline-offset: 2px;
}

.btn:active:not(:disabled) {
    transform: scale(0.98);
}

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

.btn-primary {
    background: var(--duck-yellow);
    border-color: var(--duck-yellow);
    color: var(--dark-bg);
}

.btn-primary:hover {
    background: var(--duck-orange);
    border-color: var(--duck-orange);
    color: var(--dark-bg);
}

.btn-ghost {
    background: transparent;
    color: var(--duck-yellow);
    border-color: var(--duck-yellow);
}

.btn-ghost:hover {
    background: var(--duck-yellow);
    color: var(--dark-bg);
}

.btn-success {
    color: var(--color-success);
    border-color: var(--color-success);
}

.btn-success:hover {
    background: var(--color-success);
    color: var(--dark-bg);
}

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

.btn-danger:hover {
    background: var(--color-error);
    color: var(--dark-bg);
}

.btn-warning {
    color: var(--color-warning);
    border-color: var(--color-warning);
}

.btn-warning:hover {
    background: var(--color-warning);
    color: var(--dark-bg);
}

.btn-block {
    width: 100%;
    display: block;
}

/* Loading state */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid var(--dark-bg);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    top: 50%;
    left: 50%;
    margin-top: -8px;
    margin-left: -8px;
}

.btn-primary.btn-loading::after {
    border-color: var(--dark-bg);
    border-top-color: transparent;
}

.btn-ghost.btn-loading::after,
.btn.btn-loading::after {
    border-color: var(--duck-yellow);
    border-top-color: transparent;
}

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

/* ========== FORMS ========== */

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.form-label-required {
    color: var(--duck-yellow);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px;
    background: var(--dark-bg);
    border: 2px solid var(--pixel-border);
    color: var(--dark-text);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--duck-yellow);
    outline: none;
}

.form-input:focus-visible,
.form-textarea:focus-visible {
    outline: 2px solid var(--duck-yellow);
    outline-offset: 2px;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-dim);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-input:disabled,
.form-textarea:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Inline form (admin invite) */
.form-inline {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.form-inline .form-input {
    flex: 1;
    padding: 8px 12px;
    font-size: 0.85rem;
}

/* Search bar */
.search-bar {
    margin-bottom: 16px;
}

.search-bar .form-input {
    padding: 10px 14px;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

/* ========== LINKS ========== */

.link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.2s;
}

.link:hover {
    color: var(--duck-yellow);
}

.back-link {
    display: block;
    text-align: center;
    margin-top: 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--duck-yellow);
}

/* Auth alt action (login: "Não tem conta?") */
.auth-alt-action {
    text-align: center;
    margin-bottom: 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.auth-alt-action a {
    color: var(--duck-yellow);
    text-decoration: none;
}

.auth-alt-action a:hover {
    text-decoration: underline;
}

/* ========== DIVIDER ========== */

.divider {
    display: flex;
    align-items: center;
    margin: 20px 0;
    color: var(--text-faint);
    font-size: 0.85rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--pixel-border);
}

.divider span {
    padding: 0 12px;
}

/* ========== MESSAGES ========== */

.msg-error {
    background: var(--color-error-bg);
    border: 2px solid var(--color-error);
    color: var(--color-error);
    padding: 12px;
    margin-bottom: 20px;
    font-size: 0.85rem;
    text-align: center;
}

.msg-success {
    background: var(--color-success-bg);
    border: 2px solid var(--color-success);
    color: var(--color-success);
    padding: 12px;
    margin-bottom: 20px;
    font-size: 0.85rem;
    text-align: center;
}

/* ========== CTA GUEST (index.html) ========== */

.cta-guest {
    text-align: center;
    padding: 40px 20px;
    margin-top: 40px;
    border-top: 1px solid var(--pixel-border);
}

.cta-guest h2 {
    color: var(--duck-yellow);
    font-size: 1.2rem;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.cta-guest p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* ========== ADMIN COMPONENTS ========== */

/* Tabs */
.admin-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--pixel-border);
    padding-bottom: 0;
}

.admin-tab {
    background: transparent;
    border: 2px solid var(--pixel-border);
    border-bottom: none;
    color: var(--dark-text);
    font-family: inherit;
    font-size: 0.85rem;
    letter-spacing: 1px;
    padding: 10px 20px;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: -2px;
}

.admin-tab:hover {
    border-color: var(--duck-yellow);
    color: var(--duck-yellow);
}

.admin-tab:focus-visible {
    outline: 2px solid var(--duck-yellow);
    outline-offset: 2px;
}

.admin-tab.active {
    background: var(--dark-card);
    border-color: var(--duck-yellow);
    color: var(--duck-yellow);
}

/* Admin cards */
.admin-card {
    background: var(--dark-card);
    border: 2px solid var(--pixel-border);
    padding: 16px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    box-shadow: var(--shadow-sm);
    transition: background 0.2s;
}

.admin-card:hover {
    background: var(--dark-card-hover);
}

.admin-card-info {
    flex: 1;
    min-width: 200px;
}

.admin-card-email {
    color: var(--duck-yellow);
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.admin-card-meta {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.admin-card-message {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 6px;
    font-style: italic;
}

.admin-card-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

/* User row */
.user-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.user-info {
    flex: 1;
}

.user-email {
    color: var(--duck-yellow);
    font-size: 0.95rem;
}

.user-meta {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 2px;
}

/* Badges */
.badge {
    font-size: 0.7rem;
    letter-spacing: 1px;
    padding: 2px 8px;
    border: 1px solid;
    margin-left: 8px;
}

.badge-admin {
    color: var(--duck-yellow);
    border-color: var(--duck-yellow);
}

.badge-active {
    color: var(--color-success);
    border-color: var(--color-success);
}

.badge-inactive {
    color: var(--color-error);
    border-color: var(--color-error);
}

/* Empty state */
.empty-state {
    text-align: center;
    color: var(--text-dim);
    padding: 40px 20px;
    font-size: 0.9rem;
}

.empty-state-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.empty-state-hint {
    color: var(--text-faint);
    font-size: 0.85rem;
    margin-top: 8px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 12px 20px;
    font-family: inherit;
    font-size: 0.85rem;
    letter-spacing: 1px;
    z-index: var(--z-toast);
    animation: fadeIn 0.3s;
}

.toast.hiding {
    animation: fadeOut 0.2s ease-in forwards;
}

.toast-success {
    background: var(--color-success);
    color: var(--dark-bg);
    border: 2px solid var(--color-success);
}

.toast-error {
    background: var(--color-error);
    color: var(--dark-bg);
    border: 2px solid var(--color-error);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
}

.pagination-info {
    color: var(--text-muted);
    font-size: 0.8rem;
    letter-spacing: 1px;
}

/* ========== FOOTER ========== */

footer {
    text-align: center;
    padding: 16px 20px;
    border-top: 3px solid var(--pixel-border);
    font-size: 0.85rem;
    color: var(--text-dim);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* ========== MODAL ========== */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: var(--dark-card);
    border: 2px solid var(--pixel-border);
    padding: 24px;
    max-width: 500px;
    width: 90%;
    max-height: 70vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    z-index: var(--z-modal);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--pixel-border);
}

.modal-title {
    color: var(--duck-yellow);
    font-size: 1rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--duck-yellow);
}

/* Changelog entries */

.changelog-date {
    color: var(--duck-yellow);
    font-size: 0.8rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin: 16px 0 8px;
}

.changelog-date:first-child {
    margin-top: 0;
}

.changelog-entry {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
    padding-left: 12px;
    position: relative;
}

.changelog-entry::before {
    content: '·';
    position: absolute;
    left: 0;
    color: var(--pixel-border);
}

.changelog-empty {
    color: var(--text-dim);
    font-size: 0.85rem;
    text-align: center;
    padding: 20px;
}

/* Card changelog button */

.card-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn-changelog {
    font-size: 0.8rem;
    padding: 6px 12px;
    letter-spacing: 1px;
}

/* ========== ANIMATIONS ========== */

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

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

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* ========== RESPONSIVE ========== */

@media (max-width: 1024px) {
    header {
        padding: 40px 20px 30px;
    }

    main {
        padding: 30px 20px;
    }

    .project-grid {
        gap: 16px;
    }
}

@media (max-width: 600px) {
    header h1 {
        font-size: 2rem;
    }

    .project-grid {
        grid-template-columns: 1fr;
    }

    .mascot {
        width: 100px;
        height: 100px;
    }

    .admin-tabs {
        flex-wrap: wrap;
    }

    .admin-tab {
        flex: 1 1 auto;
        padding: 8px 12px;
        font-size: 0.75rem;
    }

    .admin-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .admin-card-actions {
        width: 100%;
    }

    .form-inline {
        flex-direction: column;
    }

    .form-inline .form-input {
        width: 100%;
    }

    .user-row {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ========== ADMIN H2 ========== */

h2 {
    color: var(--duck-yellow);
    font-size: 1.2rem;
    letter-spacing: 2px;
    margin-bottom: 16px;
}