/* ============================================
   Dungeon Keeper Gold — Browser Edition
   Main Stylesheet
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=MedievalSharp&family=Cinzel:wght@400;700;900&family=Crimson+Text:ital,wght@0,400;0,700;1,400&display=swap');

/* ── CSS Variables ──────────────────────────── */
:root {
    /* Stone & earth palette */
    --dk-black:        #0a0a0a;
    --dk-dark:         #121010;
    --dk-stone:        #1a1714;
    --dk-stone-mid:    #2a2420;
    --dk-stone-light:  #3d3530;
    --dk-earth:        #4a3c2e;

    /* Fire & gold */
    --dk-gold:         #d4a634;
    --dk-gold-bright:  #f0c040;
    --dk-gold-dim:     #8a6a1a;
    --dk-fire:         #e84420;
    --dk-fire-glow:    #ff6030;
    --dk-ember:        #c03010;
    --dk-lava:         #ff4400;

    /* Keeper colors */
    --dk-red:          #cc2222;
    --dk-blue:         #2244aa;
    --dk-green:        #22aa44;
    --dk-yellow:       #ccaa22;

    /* UI colors */
    --dk-text:         #d4c8b0;
    --dk-text-dim:     #8a7e6a;
    --dk-text-bright:  #f0e8d8;
    --dk-border:       #3a3028;
    --dk-border-light: #5a4a3a;
    --dk-error:        #cc3333;
    --dk-success:      #33aa44;
    --dk-link:         #d4a634;

    /* Typography */
    --font-display:    'MedievalSharp', cursive;
    --font-heading:    'Cinzel', serif;
    --font-body:       'Crimson Text', Georgia, serif;

    /* Spacing */
    --gap-xs:  4px;
    --gap-sm:  8px;
    --gap-md:  16px;
    --gap-lg:  24px;
    --gap-xl:  40px;
    --gap-2xl: 64px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--dk-text);
    background: var(--dk-black);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Stone texture background */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(212, 166, 52, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(232, 68, 32, 0.02) 0%, transparent 50%),
        repeating-conic-gradient(
            rgba(255,255,255,0.01) 0% 25%,
            transparent 0% 50%
        ) 0 0 / 4px 4px;
    pointer-events: none;
    z-index: 0;
}

/* ── Links ─────────────────────────────────── */
a {
    color: var(--dk-link);
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover {
    color: var(--dk-gold-bright);
    text-shadow: 0 0 8px rgba(212, 166, 52, 0.4);
}

/* ── Typography ────────────────────────────── */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--dk-gold);
    letter-spacing: 0.05em;
    line-height: 1.2;
}

h1 { font-size: 2.5rem; font-weight: 900; }
h2 { font-size: 1.75rem; font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 700; }

.display-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    color: var(--dk-gold-bright);
    text-shadow:
        0 0 20px rgba(212, 166, 52, 0.6),
        0 0 40px rgba(212, 166, 52, 0.3),
        0 2px 4px rgba(0, 0, 0, 0.8);
}

/* ── Page Layout ───────────────────────────── */
.page-wrapper {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-content {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--gap-lg);
}

/* ── Stone Panel (card/container) ─────────── */
.stone-panel {
    background:
        linear-gradient(145deg, var(--dk-stone) 0%, var(--dk-stone-mid) 100%);
    border: 1px solid var(--dk-border);
    border-radius: 4px;
    padding: var(--gap-xl);
    position: relative;
    box-shadow:
        0 4px 20px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.stone-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--dk-gold-dim) 20%,
        var(--dk-gold) 50%,
        var(--dk-gold-dim) 80%,
        transparent 100%
    );
    border-radius: 4px 4px 0 0;
}

/* ── Form Elements ─────────────────────────── */
.dk-form-group {
    margin-bottom: var(--gap-lg);
}

.dk-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    color: var(--dk-gold-dim);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--gap-sm);
}

.dk-input {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--dk-text-bright);
    background: var(--dk-dark);
    border: 1px solid var(--dk-border);
    border-radius: 3px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.dk-input:focus {
    border-color: var(--dk-gold-dim);
    box-shadow: 0 0 0 2px rgba(212, 166, 52, 0.15);
}

.dk-input::placeholder {
    color: var(--dk-text-dim);
}

/* ── Buttons ───────────────────────────────── */
.dk-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--gap-sm);
    padding: 12px 28px;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border: 1px solid var(--dk-border-light);
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    line-height: 1;
}

.dk-btn-primary {
    color: var(--dk-black);
    background: linear-gradient(180deg, var(--dk-gold-bright) 0%, var(--dk-gold) 100%);
    border-color: var(--dk-gold);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
}
.dk-btn-primary:hover {
    background: linear-gradient(180deg, #ffe060 0%, var(--dk-gold-bright) 100%);
    box-shadow: 0 0 20px rgba(212, 166, 52, 0.4);
    color: var(--dk-black);
    transform: translateY(-1px);
}
.dk-btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 0 10px rgba(212, 166, 52, 0.2);
}

.dk-btn-secondary {
    color: var(--dk-text);
    background: var(--dk-stone-mid);
}
.dk-btn-secondary:hover {
    background: var(--dk-stone-light);
    color: var(--dk-text-bright);
    border-color: var(--dk-gold-dim);
}

.dk-btn-danger {
    color: #fff;
    background: var(--dk-ember);
    border-color: var(--dk-fire);
}
.dk-btn-danger:hover {
    background: var(--dk-fire);
    box-shadow: 0 0 16px rgba(232, 68, 32, 0.3);
}

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

.dk-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* ── Error / Alert Messages ────────────────── */
.dk-alert {
    padding: 12px 16px;
    border-radius: 3px;
    font-size: 0.95rem;
    margin-bottom: var(--gap-lg);
    border: 1px solid;
}

.dk-alert-error {
    color: #ffaaaa;
    background: rgba(204, 51, 51, 0.15);
    border-color: rgba(204, 51, 51, 0.3);
}

.dk-alert-success {
    color: #aaffbb;
    background: rgba(51, 170, 68, 0.15);
    border-color: rgba(51, 170, 68, 0.3);
}

.dk-alert-info {
    color: var(--dk-text);
    background: rgba(212, 166, 52, 0.1);
    border-color: rgba(212, 166, 52, 0.2);
}

/* ── Auth Pages Layout ─────────────────────── */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--gap-lg);
}

.auth-container {
    width: 100%;
    max-width: 440px;
}

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

.auth-header .display-title {
    font-size: 2.8rem;
    margin-bottom: var(--gap-xs);
}

.auth-header .subtitle {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    color: var(--dk-text-dim);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.auth-footer {
    text-align: center;
    margin-top: var(--gap-lg);
    font-size: 0.95rem;
    color: var(--dk-text-dim);
}

/* ── Main Menu ─────────────────────────────── */
.menu-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--gap-lg);
}

.menu-container {
    width: 100%;
    max-width: 600px;
    text-align: center;
}

.menu-title {
    margin-bottom: var(--gap-xs);
}

.menu-subtitle {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--dk-text-dim);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: var(--gap-2xl);
}

.menu-grid {
    display: flex;
    flex-direction: column;
    gap: var(--gap-md);
}

.menu-btn {
    padding: 18px 32px;
    font-size: 1.1rem;
    position: relative;
    overflow: hidden;
}

.menu-btn .menu-btn-desc {
    display: block;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    text-transform: none;
    opacity: 0.7;
    margin-top: 4px;
}

.menu-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--dk-border), transparent);
    margin: var(--gap-sm) 0;
}

.menu-user-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--gap-md);
    margin-top: var(--gap-xl);
    background: var(--dk-dark);
    border: 1px solid var(--dk-border);
    border-radius: 3px;
    font-size: 0.9rem;
}

.menu-user-bar .username {
    font-family: var(--font-heading);
    color: var(--dk-gold);
}

/* ── Campaign Map ──────────────────────────── */
.campaign-page {
    padding: var(--gap-xl) var(--gap-lg);
}

.campaign-header {
    text-align: center;
    margin-bottom: var(--gap-xl);
}

.campaign-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--gap-lg);
    max-width: 1100px;
    margin: 0 auto;
}

.level-card {
    background: var(--dk-stone);
    border: 1px solid var(--dk-border);
    border-radius: 4px;
    padding: var(--gap-lg);
    transition: all 0.25s ease;
    cursor: pointer;
    position: relative;
}

.level-card:hover {
    border-color: var(--dk-gold-dim);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.level-card.locked {
    opacity: 0.4;
    cursor: not-allowed;
    filter: grayscale(0.5);
}
.level-card.locked:hover {
    transform: none;
    border-color: var(--dk-border);
    box-shadow: none;
}

.level-card.completed {
    border-color: var(--dk-gold-dim);
}
.level-card.completed::after {
    content: '✓';
    position: absolute;
    top: var(--gap-md);
    right: var(--gap-md);
    font-size: 1.2rem;
    color: var(--dk-success);
}

.level-number {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    color: var(--dk-text-dim);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: var(--gap-xs);
}

.level-name {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--dk-gold);
    margin-bottom: var(--gap-sm);
}

.level-desc {
    font-size: 0.9rem;
    color: var(--dk-text-dim);
    line-height: 1.5;
}

.level-stats {
    margin-top: var(--gap-md);
    padding-top: var(--gap-sm);
    border-top: 1px solid var(--dk-border);
    font-size: 0.8rem;
    color: var(--dk-text-dim);
    display: flex;
    gap: var(--gap-md);
}

/* ── Campaign Tabs ─────────────────────────── */
.campaign-tabs {
    display: flex;
    justify-content: center;
    gap: var(--gap-sm);
    margin-bottom: var(--gap-xl);
}

.campaign-tab {
    padding: 10px 20px;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dk-text-dim);
    background: var(--dk-stone);
    border: 1px solid var(--dk-border);
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.2s;
}

.campaign-tab:hover {
    color: var(--dk-text);
    border-color: var(--dk-border-light);
}

.campaign-tab.active {
    color: var(--dk-gold);
    border-color: var(--dk-gold-dim);
    background: var(--dk-stone-mid);
}

/* ── Game Container (in-level) ─────────────── */
.game-page {
    margin: 0;
    padding: 0;
    overflow: hidden;
    height: 100vh;
    background: #000;
}

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

#game-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

#ui-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

#ui-overlay > * {
    pointer-events: auto;
}

/* ── Loading Screen ────────────────────────── */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--dk-black);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-bar-track {
    width: 320px;
    height: 6px;
    background: var(--dk-stone);
    border-radius: 3px;
    margin-top: var(--gap-lg);
    overflow: hidden;
}

.loading-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--dk-gold-dim), var(--dk-gold-bright));
    border-radius: 3px;
    transition: width 0.3s ease;
}

.loading-text {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    color: var(--dk-text-dim);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: var(--gap-md);
}

/* ── Save/Load Modal ───────────────────────── */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}

.modal-backdrop.visible {
    opacity: 1;
    visibility: visible;
}

.modal-panel {
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
}

.save-slot {
    display: flex;
    align-items: center;
    gap: var(--gap-md);
    padding: var(--gap-md);
    background: var(--dk-dark);
    border: 1px solid var(--dk-border);
    border-radius: 3px;
    margin-bottom: var(--gap-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.save-slot:hover {
    border-color: var(--dk-gold-dim);
    background: var(--dk-stone);
}

.save-slot.empty {
    opacity: 0.5;
    font-style: italic;
}

.save-slot-number {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--dk-gold-dim);
    min-width: 32px;
    text-align: center;
}

.save-slot-info {
    flex: 1;
}

.save-slot-name {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--dk-text-bright);
}

.save-slot-meta {
    font-size: 0.8rem;
    color: var(--dk-text-dim);
    margin-top: 2px;
}

/* ── Responsive ────────────────────────────── */
@media (max-width: 768px) {
    .display-title {
        font-size: 2.2rem;
    }

    .auth-header .display-title {
        font-size: 2rem;
    }

    .stone-panel {
        padding: var(--gap-lg);
    }

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

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

    .menu-btn {
        padding: 14px 24px;
        font-size: 1rem;
    }
}

/* ── Animations ────────────────────────────── */
@keyframes flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.85; }
}

@keyframes fireGlow {
    0%, 100% { text-shadow: 0 0 20px rgba(212, 166, 52, 0.6), 0 0 40px rgba(212, 166, 52, 0.3); }
    50% { text-shadow: 0 0 30px rgba(232, 68, 32, 0.6), 0 0 60px rgba(212, 166, 52, 0.4); }
}

.fire-glow {
    animation: fireGlow 3s ease-in-out infinite;
}

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

.fade-in-up {
    animation: fadeInUp 0.5s ease forwards;
}