/* ============================================================
   KASUGAI — Demon Slayer Theme
   Color Palette:
     Deep Night Charcoal  #10101A
     Blood Crimson        #731A1E
     Aged Timber          #33261C
     Lantern Gold         #DFA83E
     Slate Shadow         #2C3036
     Parchment Cream      #EFE8D1
     Mystic Indigo        #271E2D
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700&family=Inter:wght@300;400;500;600&display=swap');

/* ─── Custom Properties ─────────────────────────────────── */
:root {
    --night:       #10101A;
    --crimson:     #731A1E;
    --crimson-dim: #4f1214;
    --crimson-hot: #9b2226;
    --timber:      #33261C;
    --gold:        #DFA83E;
    --gold-dim:    #a87b28;
    --shadow:      #2C3036;
    --parchment:   #EFE8D1;
    --parchment-dim: #c8bfa4;
    --indigo:      #271E2D;
    --text-main:   #EFE8D1;
    --text-dim:    #a09277;
    --border:      rgba(115, 26, 30, 0.35);
    --border-gold: rgba(223, 168, 62, 0.3);
    --glow-crimson: 0 0 18px rgba(115, 26, 30, 0.55);
    --glow-gold:    0 0 14px rgba(223, 168, 62, 0.4);
    --font-display: 'Cinzel', serif;
    --font-body:    'Inter', sans-serif;
    --radius-sm:    6px;
    --radius-md:    10px;
    --radius-lg:    16px;
    --transition:   0.22s ease;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--night);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    /* Subtle washi-paper texture overlay */
    background-image:
        radial-gradient(ellipse 80% 60% at 10% 110%, rgba(115,26,30,0.12) 0%, transparent 65%),
        radial-gradient(ellipse 60% 50% at 90% -10%, rgba(39,30,45,0.25) 0%, transparent 70%);
}

/* ─── Scrollbar ─────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--night); }
::-webkit-scrollbar-thumb { background: var(--crimson-dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--crimson); }

/* ─── ═══════════════════════════════════════════════════── */
/* LOGIN PAGE                                               */
/* ─── ═══════════════════════════════════════════════════── */

.login-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 440px;
    padding: 20px;
    position: relative;
}

/* Crow silhouette decorative element */
.login-container::before {
    content: '🐦‍⬛';
    position: absolute;
    font-size: 4rem;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.15;
    filter: grayscale(1);
    pointer-events: none;
}

.splash-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--gold);
    margin-bottom: 28px;
    text-align: center;
    letter-spacing: 0.08em;
    text-shadow: var(--glow-gold);
}

.login-card {
    background: linear-gradient(145deg, var(--timber) 0%, var(--indigo) 100%);
    padding: 44px 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-gold);
    box-shadow: 0 20px 60px rgba(0,0,0,0.55), var(--glow-crimson);
    text-align: center;
    width: 100%;
    position: relative;
    overflow: hidden;
}

/* Top gold accent line */
.login-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.login-card h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    color: var(--gold);
    margin-bottom: 28px;
    letter-spacing: 0.06em;
    text-shadow: var(--glow-gold);
}

.login-card input {
    width: 100%;
    padding: 13px 16px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-family: var(--font-body);
    background: rgba(16, 16, 26, 0.7);
    color: var(--parchment);
    transition: border-color var(--transition), box-shadow var(--transition);
}

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

.login-card input:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(223, 168, 62, 0.15);
}

.login-card button {
    background: linear-gradient(135deg, var(--crimson) 0%, var(--crimson-hot) 100%);
    color: var(--parchment);
    border: none;
    padding: 13px 20px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all var(--transition);
    width: 100%;
    margin-bottom: 8px;
    box-shadow: 0 4px 15px rgba(115, 26, 30, 0.4);
}

.login-card button:hover {
    background: linear-gradient(135deg, var(--crimson-hot) 0%, #c23030 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(115, 26, 30, 0.55);
}

.login-card button:active { transform: translateY(0); }

.login-card a {
    color: var(--parchment-dim);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition);
}

.login-card a:hover { color: var(--gold); }

.message-box {
    padding: 12px;
    margin-top: 14px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.9rem;
    text-align: center;
    border: 1px solid transparent;
}

.message-box.success {
    background: rgba(51, 38, 28, 0.8);
    border-color: var(--gold);
    color: var(--gold);
}

.message-box.error {
    background: rgba(115, 26, 30, 0.3);
    border-color: var(--crimson);
    color: #f08080;
}

/* ─── ═══════════════════════════════════════════════════── */
/* MAIN APP LAYOUT                                          */
/* ─── ═══════════════════════════════════════════════════── */

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100%;
    max-width: 1800px;
    margin: 0 auto;
    background-color: var(--night);
    box-shadow: 0 0 80px rgba(0,0,0,0.6);
}

.content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ─── Header ─────────────────────────────────────────────── */

.header {
    background: linear-gradient(90deg, var(--indigo) 0%, var(--timber) 50%, var(--indigo) 100%);
    padding: 0.85rem 1.8rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-gold);
    flex-shrink: 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.4);
    position: relative;
}

/* Bottom gold line on header */
.header::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--gold) 50%, transparent 100%);
    opacity: 0.5;
}

.header-title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 0.1em;
    text-shadow: var(--glow-gold);
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-title::before { content: '🐦‍⬛'; font-size: 1.1rem; }

.header-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.logged-in-username {
    font-size: 0.85rem;
    color: var(--parchment-dim);
    font-weight: 500;
    letter-spacing: 0.03em;
}

.canvas-launch-btn {
    background: rgba(223, 168, 62, 0.12);
    color: var(--gold);
    border: 1px solid var(--border-gold);
    padding: 0.55rem 1.1rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    font-family: var(--font-body);
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.03em;
}

.canvas-launch-btn:hover {
    background: rgba(223, 168, 62, 0.25);
    box-shadow: var(--glow-gold);
    transform: translateY(-1px);
}

.logout-button {
    background: rgba(115, 26, 30, 0.25);
    color: var(--parchment);
    border: 1px solid var(--border);
    padding: 0.55rem 1.1rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.85rem;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.logout-button:hover {
    background: var(--crimson);
    border-color: var(--crimson-hot);
    box-shadow: var(--glow-crimson);
}

/* ─── Sidebar ────────────────────────────────────────────── */

.sidebar {
    width: 290px;
    flex-shrink: 0;
    background: linear-gradient(180deg, var(--indigo) 0%, var(--night) 100%);
    padding: 1.5rem 0.9rem;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    position: relative;
}

.sidebar-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--gold);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0 0.5rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--border-gold);
}

.user-search-container {
    position: relative;
}

.user-search-container .fa-magnifying-glass {
    position: absolute;
    top: 50%;
    left: 14px;
    transform: translateY(-50%);
    color: var(--text-dim);
    font-size: 0.85rem;
    pointer-events: none;
}

.sidebar input#userSearch {
    width: 100%;
    padding: 10px 10px 10px 38px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    font-family: var(--font-body);
    font-size: 0.88rem;
    background: rgba(16, 16, 26, 0.6);
    color: var(--parchment);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.sidebar input#userSearch::placeholder { color: var(--text-dim); }

.sidebar input#userSearch:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 2px rgba(223, 168, 62, 0.12);
}

.user-list-container {
    flex: 1;
    overflow-y: auto;
}

#userList { list-style: none; }

.user-item {
    display: flex;
    align-items: center;
    padding: 0.7rem 0.6rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition), border-color var(--transition);
    gap: 12px;
    margin-bottom: 4px;
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.user-item::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--crimson);
    opacity: 0;
    transition: opacity var(--transition);
    border-radius: 0 2px 2px 0;
}

.user-item:hover {
    background-color: rgba(51, 38, 28, 0.5);
    border-color: var(--border);
}

.user-item:hover::before { opacity: 1; }

.user-item.active {
    background: linear-gradient(90deg, rgba(115,26,30,0.3) 0%, rgba(115,26,30,0.1) 100%);
    border-color: var(--border);
}

.user-item.active::before { opacity: 1; }

.user-item .avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--crimson) 0%, var(--timber) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--parchment);
    flex-shrink: 0;
    border: 1px solid var(--border-gold);
}

.user-item .username {
    flex: 1;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--parchment);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-left: auto;
}

.status-dot.online {
    background-color: var(--gold);
    box-shadow: 0 0 6px rgba(223, 168, 62, 0.6);
}

.status-dot.offline { background-color: #4a4f5a; }

.status-label {
    font-size: 0.65rem;
    padding: 2px 7px;
    border-radius: 10px;
    margin-left: auto;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

.status-label.sent {
    background: rgba(51, 38, 28, 0.8);
    color: var(--gold);
    border: 1px solid var(--border-gold);
}

.status-label.received {
    background: rgba(115, 26, 30, 0.4);
    color: #f08080;
    border: 1px solid var(--border);
}

/* ─── Chat Interface ─────────────────────────────────────── */

.interface {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, var(--shadow) 0%, #1e1a24 100%);
}

.chat-header {
    padding: 1.1rem 1.6rem;
    background: rgba(39, 30, 45, 0.7);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(6px);
}

.chat-header h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--parchment);
    letter-spacing: 0.05em;
    font-weight: 600;
}

.chatbox {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    background-image:
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(115,26,30,0.06) 0%, transparent 70%);
}

.message { display: flex; max-width: 72%; }

.message-content {
    padding: 0.75rem 1.1rem;
    border-radius: 14px;
    line-height: 1.55;
}

.message-content strong {
    display: block;
    margin-bottom: 4px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.message-content p { margin: 0; font-size: 0.93rem; }

.message-content .timestamp {
    display: block;
    font-size: 0.68rem;
    text-align: right;
    margin-top: 6px;
    opacity: 0.55;
}

/* Own messages — crimson-tinted */
.message.self {
    align-self: flex-end;
    margin-left: auto;
}

.message.self .message-content {
    background: linear-gradient(135deg, rgba(115,26,30,0.45) 0%, rgba(79,18,20,0.55) 100%);
    border: 1px solid rgba(115,26,30,0.5);
    border-top-right-radius: 4px;
    color: var(--parchment);
}

.message.self .message-content strong { color: var(--gold); }

/* Others' messages — dark timber */
.message.other {
    align-self: flex-start;
    margin-right: auto;
}

.message.other .message-content {
    background: linear-gradient(135deg, rgba(51,38,28,0.5) 0%, rgba(39,30,45,0.55) 100%);
    border: 1px solid var(--border);
    border-top-left-radius: 4px;
    color: var(--parchment);
}

.message.other .message-content strong { color: var(--gold); }

.system-message {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.78rem;
    margin: 8px 0;
    font-style: italic;
}

/* ─── Message Input ──────────────────────────────────────── */

.message-input-container,
.message-request-bar {
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    background: rgba(16, 16, 26, 0.7);
    backdrop-filter: blur(8px);
}

.message-input-container {
    display: flex;
    align-items: center;
    padding: 0.9rem 1.4rem;
    gap: 0.9rem;
    position: relative;
}

.message-input-container.hidden,
.message-request-bar.hidden { display: none; }

.message-input-container input#m {
    flex: 1;
    padding: 11px 18px;
    font-size: 0.93rem;
    border-radius: 22px;
    border: 1px solid var(--border);
    outline: none;
    font-family: var(--font-body);
    background: rgba(44, 48, 54, 0.7);
    color: var(--parchment);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.message-input-container input#m::placeholder { color: var(--text-dim); }

.message-input-container input#m:focus {
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(223, 168, 62, 0.12);
}

.icon-button {
    background: transparent;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--text-dim);
    transition: color var(--transition);
    padding: 6px;
}

.icon-button:hover { color: var(--gold); }

.send-button {
    background: linear-gradient(135deg, var(--crimson) 0%, var(--crimson-hot) 100%);
    color: var(--parchment);
    border: none;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    box-shadow: 0 3px 12px rgba(115, 26, 30, 0.4);
}

.send-button:hover {
    background: linear-gradient(135deg, var(--crimson-hot) 0%, #c23030 100%);
    transform: scale(1.07);
    box-shadow: var(--glow-crimson);
}

/* ─── Emoji Picker ───────────────────────────────────────── */

.emoji-picker-container { position: relative; }

emoji-picker {
    position: absolute;
    bottom: 55px;
    left: 0;
    z-index: 100;
    --background: var(--indigo);
    --border-color: var(--border);
}

emoji-picker.hidden { display: none; }

/* ─── Message Request Bar ────────────────────────────────── */

.message-request-bar {
    padding: 1.4rem;
    text-align: center;
    color: var(--parchment);
}

.request-info { margin-bottom: 1rem; color: var(--parchment); }

.request-info p {
    font-size: 0.88rem;
    color: var(--text-dim);
    margin-top: 5px;
    max-width: 450px;
    margin-left: auto;
    margin-right: auto;
}

.request-actions { display: flex; gap: 0.9rem; justify-content: center; }

.request-action-btn {
    border: none;
    padding: 9px 20px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    letter-spacing: 0.04em;
}

.request-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0,0,0,0.3);
}

.block-btn {
    background: rgba(60, 60, 70, 0.8);
    color: var(--parchment-dim);
    border: 1px solid rgba(100,100,120,0.3);
}

.delete-btn {
    background: rgba(115, 26, 30, 0.5);
    color: #f08080;
    border: 1px solid var(--border);
}

.accept-btn {
    background: linear-gradient(135deg, var(--gold-dim) 0%, var(--gold) 100%);
    color: var(--night);
    font-family: var(--font-display);
}

/* ─── Animations ─────────────────────────────────────────── */

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.message { animation: fadeSlideIn 0.2s ease forwards; }

@keyframes flicker {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.88; }
}

.header-title { animation: flicker 4s ease-in-out infinite; }

/* ─── Responsive (Mobile) ────────────────────────────────── */
.mobile-back-btn {
    display: none;
}

@media (max-width: 768px) {
    .content {
        flex-direction: column;
        position: relative;
    }
    
    .sidebar {
        width: 100%;
        flex: 1;
        max-height: none;
        border-right: none;
        border-bottom: none;
        padding: 1.2rem 0.9rem;
    }
    
    .app-container.chat-active .sidebar {
        display: none !important;
    }
    
    .interface {
        display: none;
    }
    
    .app-container.chat-active .interface {
        display: flex !important;
        flex: 1;
        width: 100%;
    }
    
    .mobile-back-btn {
        display: block;
        background: transparent;
        border: none;
        color: var(--gold);
        font-size: 1.3rem;
        cursor: pointer;
        padding-right: 15px;
    }
    
    .header {
        padding: 0.8rem;
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .header-controls {
        width: 100%;
        justify-content: space-between;
    }
    
    .canvas-launch-btn span {
        display: none; /* hide text on very small screens, show icon only */
    }
    
    .canvas-launch-btn::after {
        content: 'Canvas';
        font-size: 0.85rem;
    }
    
    .message {
        max-width: 90%;
    }
    
    .chatbox {
        padding: 1rem;
    }
    
    .message-input-container {
        padding: 0.7rem;
    }
    
    .login-container::before {
        font-size: 3rem;
        top: -45px;
    }
}