/*
  Start Screen & Chapter Select
  Noir Detective Theme - EduBytes
*/

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

body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: #000;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #e8dcc8;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ── Background layers ───────────────────────── */
.start-bg {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: url('../assets/rooms/outside.png') center / cover no-repeat;
    filter: blur(28px) brightness(0.22) saturate(1.4);
    transform: scale(1.15);
    z-index: 0;
    animation: bg-drift 20s ease-in-out infinite alternate;
}

@keyframes bg-drift {
    0%   { transform: scale(1.15) translate(0, 0); }
    100% { transform: scale(1.20) translate(-8px, -5px); }
}

/* Grain overlay */
.start-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0,0,0,0.03) 2px,
        rgba(0,0,0,0.03) 4px
    );
    pointer-events: none;
}

/* Noir vignette */
.vignette {
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 30%, rgba(0,0,0,0.75) 100%);
    z-index: 1;
    pointer-events: none;
}

/* ── Main container ──────────────────────────── */
.start-container {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    animation: container-enter 1.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    opacity: 0;
}

@keyframes container-enter {
    0%   { opacity: 0; transform: translateY(30px) scale(0.96); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Title area ──────────────────────────────── */
.title-group {
    text-align: center;
    margin-bottom: 24px;
}

.title-label {
    font-size: 0.85rem;
    letter-spacing: 8px;
    text-transform: uppercase;
    color: rgba(200, 134, 10, 0.7);
    margin-bottom: 8px;
    animation: label-flicker 4s ease-in-out infinite;
}

@keyframes label-flicker {
    0%, 100% { opacity: 0.7; }
    50%      { opacity: 1; }
}

.home-logo {
    width: 80px;
    height: auto;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 15px rgba(200, 134, 10, 0.4));
    animation: logo-glow 4s ease-in-out infinite;
}

@keyframes logo-glow {
    0%, 100% { filter: drop-shadow(0 0 15px rgba(200, 134, 10, 0.4)); transform: scale(1); }
    50%      { filter: drop-shadow(0 0 25px rgba(200, 134, 10, 0.6)); transform: scale(1.05); }
}

.title-main {
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 12px;
    color: #fff;
    text-shadow:
        0 0 40px rgba(200, 134, 10, 0.35),
        0 0 80px rgba(200, 134, 10, 0.15),
        0 2px 4px rgba(0,0,0,0.9);
    line-height: 1.1;
}

.title-main span {
    display: block;
    font-weight: 700;
    color: #c8860a;
    font-size: 0.45em;
    letter-spacing: 18px;
    margin-top: 4px;
    text-shadow: 0 0 30px rgba(200, 134, 10, 0.5);
}

.title-divider {
    width: 120px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(200, 134, 10, 0.6), transparent);
    margin: 20px auto 0;
}

/* ── Buttons ─────────────────────────────────── */
.btn-group {
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 280px;
}

.btn-noir {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: #e8dcc8;
    background: rgba(10, 10, 15, 0.85);
    border: 1.5px solid rgba(200, 134, 10, 0.3);
    border-radius: 4px;
    cursor: pointer;
    backdrop-filter: blur(12px);
    box-shadow:
        0 4px 24px rgba(0,0,0,0.7),
        inset 0 1px 0 rgba(255,255,255,0.04);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
}

.btn-noir::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(200, 134, 10, 0.08), transparent 60%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.btn-noir:hover {
    border-color: rgba(200, 134, 10, 0.9);
    color: #fff;
    transform: translateY(-2px) scale(1.02);
    box-shadow:
        0 8px 32px rgba(0,0,0,0.8),
        0 0 20px rgba(200, 134, 10, 0.2),
        inset 0 0 12px rgba(200, 134, 10, 0.1);
}

.btn-noir:hover::before {
    opacity: 1;
}

.btn-noir:active {
    transform: translateY(0) scale(0.98);
    transition-duration: 0.1s;
}

.btn-noir .btn-icon {
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.btn-noir:hover .btn-icon {
    transform: scale(1.2);
}

/* Play button special styling */
.btn-play {
    border-color: rgba(200, 134, 10, 0.5);
    background: rgba(15, 12, 8, 0.9);
}

.btn-play::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 4px;
    background: linear-gradient(135deg, rgba(200, 134, 10, 0.15), transparent 40%);
    pointer-events: none;
}

/* ── Subtitle / footer ───────────────────────── */
.start-footer {
    margin-top: 28px;
    text-align: center;
    font-size: 0.7rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: rgba(200, 134, 10, 0.35);
}

/* ── Chapter Select Overlay ──────────────────── */
.chapter-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.chapter-overlay.active {
    opacity: 1;
    visibility: visible;
}

.chapter-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(16px);
}

.chapter-panel {
    position: relative;
    width: 90%;
    max-width: 600px;
    max-height: 85vh;
    background: rgba(10, 10, 15, 0.92);
    border: 1px solid rgba(200, 134, 10, 0.25);
    border-radius: 8px;
    padding: 40px 36px;
    box-shadow:
        0 24px 80px rgba(0,0,0,0.9),
        inset 0 1px 0 rgba(255,255,255,0.03);
    backdrop-filter: blur(20px);
    transform: translateY(20px) scale(0.95);
    transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    overflow-y: auto;
}

.chapter-overlay.active .chapter-panel {
    transform: translateY(0) scale(1);
}

/* Panel scrollbar */
.chapter-panel::-webkit-scrollbar {
    width: 4px;
}
.chapter-panel::-webkit-scrollbar-track {
    background: transparent;
}
.chapter-panel::-webkit-scrollbar-thumb {
    background: rgba(200, 134, 10, 0.3);
    border-radius: 2px;
}

.chapter-header {
    text-align: center;
    margin-bottom: 32px;
}

.chapter-header h2 {
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 6px;
    text-transform: uppercase;
    color: #c8860a;
    margin-bottom: 10px;
}

.chapter-header-line {
    width: 60px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(200, 134, 10, 0.5), transparent);
    margin: 0 auto;
}

/* ── Chapter list ────────────────────────────── */
.chapter-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chapter-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: rgba(30, 30, 40, 0.4);
    border: 1px solid rgba(200, 134, 10, 0.1);
    border-radius: 6px;
    transition: all 0.35s ease;
    cursor: default;
    position: relative;
    overflow: hidden;
}

.chapter-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 3px;
    height: 100%;
    background: rgba(200, 134, 10, 0.2);
    transition: all 0.35s ease;
}

/* Available chapter */
.chapter-item.available {
    cursor: pointer;
    border-color: rgba(200, 134, 10, 0.25);
}

.chapter-item.available::before {
    background: #c8860a;
    box-shadow: 0 0 8px rgba(200, 134, 10, 0.4);
}

.chapter-item.available:hover {
    background: rgba(40, 35, 25, 0.6);
    border-color: rgba(200, 134, 10, 0.5);
    transform: translateX(4px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.chapter-item.available:hover::before {
    width: 4px;
    box-shadow: 0 0 14px rgba(200, 134, 10, 0.6);
}

/* Locked chapter */
.chapter-item.locked {
    opacity: 0.4;
}

.chapter-item.locked::before {
    background: rgba(100, 100, 100, 0.3);
}

/* Chapter number badge */
.chapter-num {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: #c8860a;
    border: 1px solid rgba(200, 134, 10, 0.3);
    border-radius: 50%;
    background: rgba(200, 134, 10, 0.06);
}

.chapter-item.locked .chapter-num {
    color: rgba(150, 150, 150, 0.5);
    border-color: rgba(150, 150, 150, 0.2);
    background: rgba(150, 150, 150, 0.04);
}

.chapter-info {
    flex: 1;
    min-width: 0;
}

.chapter-title {
    font-size: 0.88rem;
    font-weight: 500;
    letter-spacing: 1px;
    color: #e8dcc8;
    margin-bottom: 3px;
}

.chapter-item.locked .chapter-title {
    color: rgba(150, 150, 150, 0.6);
}

.chapter-status {
    font-size: 0.68rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.chapter-status.playable {
    color: rgba(200, 134, 10, 0.8);
}

.chapter-status.coming-soon {
    color: rgba(150, 150, 150, 0.45);
}

/* Lock icon */
.chapter-lock {
    flex-shrink: 0;
    font-size: 0.9rem;
    opacity: 0.3;
}

/* ── Back button ─────────────────────────────── */
.btn-back {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 28px auto 0;
    padding: 10px 28px;
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: rgba(232, 220, 200, 0.5);
    background: transparent;
    border: 1px solid rgba(200, 134, 10, 0.15);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-back:hover {
    color: #e8dcc8;
    border-color: rgba(200, 134, 10, 0.5);
    background: rgba(200, 134, 10, 0.06);
}

/* ── Launch Modal ────────────────────────────── */
.launch-modal {
    max-width: 420px;
    text-align: center;
}

.launch-subtitle {
    font-size: 0.8rem;
    color: rgba(232, 220, 200, 0.5);
    line-height: 1.6;
    margin-bottom: 28px;
    letter-spacing: 0.5px;
}

.launch-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
}

.launch-actions .btn-noir {
    width: 100%;
}

/* ── Fade-out transition ─────────────────────── */
.fade-out {
    animation: screen-fade-out 1.2s ease-in forwards;
}

@keyframes screen-fade-out {
    0%   { opacity: 1; }
    100% { opacity: 0; }
}

/* ── Responsive ──────────────────────────────── */
@media (max-width: 480px) {
    .title-main {
        letter-spacing: 6px;
    }
    .title-main span {
        letter-spacing: 10px;
    }
    .btn-group {
        width: 240px;
    }
    .btn-noir {
        padding: 14px 24px;
        font-size: 0.85rem;
        letter-spacing: 3px;
    }
    .chapter-panel {
        padding: 28px 20px;
    }
    .chapter-item {
        padding: 12px 14px;
        gap: 12px;
    }
    .chapter-num {
        width: 30px;
        height: 30px;
        font-size: 0.7rem;
    }
}