/* ==========================================================================
   Deckster — Global Design System
   Dark theme with indigo accents. All pages inherit these variables.
   ========================================================================== */

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

:root {
    /* Background tiers (darkest to lightest) */
    --bg-base:        #1a1a24;
    --bg-surface:     #22222e;
    --bg-elevated:    #2a2a38;
    --bg-hover:       #323242;

    /* Primary accent — Indigo */
    --accent:         #babaf4;
    --accent-hover:   #7986cb;
    --accent-active:  #3f51b5;
    --accent-bg:      rgba(186, 186, 244, 0.12);

    /* Semantic colors */
    --success:        #66bb6a;
    --success-hover:  #81c784;
    --danger:         #e57373;
    --danger-hover:   #ef9a9a;
    --warning:        #ffb74d;
    --warning-hover:  #ffcc80;

    /* Text hierarchy */
    --text-primary:   #e0e0ec;
    --text-secondary: #9a9ab0;
    --text-muted:     #a5a5bb;

    /* Borders & outlines */
    --border:         #363648;
    --border-hover:   #4a4a60;
    --focus-ring:     #8ab4f8;

    /* Scrollbar */
    --scrollbar-thumb: #4a4a60;
    --scrollbar-track: #1a1a24;

    /* Typography */
    --font-family:    'Montserrat', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;

    /* Layout */
    --header-height:  56px;
    --radius-sm:      4px;
    --radius-md:      6px;
    --radius-lg:      8px;
    --radius-xl:      12px;
    --shadow-sm:      0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md:      0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg:      0 8px 24px rgba(0, 0, 0, 0.6);
}

/* Global resets */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* Focus states for accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

/* ---- Header ---- */
header {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 500;
}

.logo {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--accent);
    margin: 0;
    letter-spacing: 0.5px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

nav ul li a,
nav ul li button {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: color 0.2s, background-color 0.2s;
    border: none;
    background: none;
    cursor: pointer;
    font-family: var(--font-family);
}

nav ul li a:hover,
nav ul li a:focus,
nav ul li button:hover,
nav ul li button:focus {
    color: var(--text-primary);
    background-color: var(--bg-elevated);
    text-decoration: none;
}

header .welcome-text {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
}

/* ---- Main content area ---- */
main {
    min-height: calc(100vh - var(--header-height) - 48px);
}

/* ---- Footer ---- */
footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

footer p {
    margin: 0;
}

/* ---- Shared button styles ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-family);
    transition: background-color 0.2s, color 0.2s, box-shadow 0.2s;
    text-decoration: none;
    line-height: 1.4;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background-color: var(--accent);
    color: #1a1a24;
}

.btn-primary:hover {
    background-color: #a1aeeb;
    color: #1a1a24;
}

.btn-secondary {
    background-color: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-hover);
}

.btn-success {
    background-color: var(--success);
    color: #1a1a24;
}

.btn-success:hover {
    background-color: var(--success-hover);
    color: #1a1a24;
}

.btn-danger {
    background-color: var(--danger);
    color: #1a1a24;
}

.btn-danger:hover {
    background-color: var(--danger-hover);
    color: #1a1a24;
}

.btn-warning {
    background-color: var(--warning);
    color: #1a1a24;
}

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

.btn-sm {
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
}

.btn-link {
    background: none;
    border: none;
    padding: 0;
    color: inherit;
    cursor: pointer;
    font-family: var(--font-family);
}

/* ---- Shared table styles ---- */
.dark-table {
    width: 100%;
    border-collapse: collapse;
    color: var(--text-primary);
}

.dark-table thead th {
    background-color: var(--bg-elevated);
    color: var(--accent);
    padding: 0.6rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-align: left;
    border-bottom: 2px solid var(--border);
}

.dark-table tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background-color 0.15s;
}

.dark-table tbody tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
}

.dark-table tbody tr:hover {
    background-color: var(--accent-bg);
}

.dark-table td {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
}

/* ---- Generic modal styles (used across all pages) ---- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active,
.modal.open {
    display: flex;
}

/* Dark backdrop overlay inside modals */
.modal > .modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.6);
}

.modal-content {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    max-width: 90%;
    width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}

.modal-content h2,
.modal-content h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 600;
}

.modal-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.modal-actions {
    margin-top: 1.25rem;
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

.modal-actions button {
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    font-family: var(--font-family);
    transition: background-color 0.2s;
}

.modal-actions .confirm-btn,
.modal-actions .btn-danger {
    background-color: var(--danger);
    color: #1a1a24;
}

.modal-actions .confirm-btn:hover,
.modal-actions .btn-danger:hover {
    background-color: var(--danger-hover);
    color: #1a1a24;
}

.modal-actions .cancel-btn,
.modal-actions .btn-secondary {
    background-color: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.modal-actions .cancel-btn:hover,
.modal-actions .btn-secondary:hover {
    background-color: var(--bg-hover);
}

/* ---- Utility: screen-reader-only content ---- */
.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;
}

/* ---- Foil card indicator: gold text color ---- */
.foil-card {
    color: #c8a93c !important;
}

/* ---- About page ---- */
.about-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.about-container h1 {
    color: var(--text-primary);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.about-container p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

/* ---- Global scrollbar styling ---- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

/* ---- Responsive header ---- */
@media (max-width: 768px) {
    header {
        flex-wrap: wrap;
        height: auto;
        padding: 0.75rem 1rem;
        gap: 0.5rem;
    }

    nav ul {
        flex-wrap: wrap;
        gap: 0.15rem;
    }

    header .welcome-text {
        width: 100%;
        text-align: center;
        order: -1;
    }
}