:root {
    --bg-pure: #070708;
    --bg-panel: #0e0e11;
    --bg-elevated: #16161a;
    --border-dim: #222228;
    --border-crimson: #5c0a16;
    --crimson-main: #8f0d22;
    --crimson-bright: #b91c1c;
    --crimson-glow: rgba(185, 28, 28, 0.25);
    --text-primary: #ececed;
    --text-muted: #71717a;
    --text-jp: #4a4a52;
}

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

body {
    font-family: "JetBrains Mono", "SF Mono", "Consolas", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background-color: var(--bg-pure);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    letter-spacing: 0.02em;
}

.hidden {
    display: none !important;
}

/* --- EKRAN AUTORYZACJI --- */
.auth-container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    padding: 20px;
    background: radial-gradient(circle at 50% 0%, #1a0508 0%, var(--bg-pure) 65%);
}

.auth-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-dim);
    border-top: 3px solid var(--crimson-main);
    padding: 36px 32px;
    width: 100%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.85);
}

.brand-mark {
    font-size: 0.75rem;
    color: var(--crimson-bright);
    letter-spacing: 0.35em;
    text-align: center;
    font-weight: 700;
}

.auth-card h2 {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.12em;
}

.auth-sub {
    text-align: center;
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-dim);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group label {
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.auth-card input {
    padding: 12px 14px;
    border: 1px solid var(--border-dim);
    background: var(--bg-pure);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.auth-card input:focus {
    border-color: var(--crimson-bright);
}

.auth-actions {
    display: flex;
    gap: 10px;
    margin-top: 8px;
}

.btn-primary, .btn-secondary {
    flex: 1;
    padding: 12px;
    font-family: inherit;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-primary {
    background: var(--crimson-main);
    color: var(--text-primary);
    border: 1px solid var(--crimson-bright);
}

.btn-primary:hover {
    background: var(--crimson-bright);
    box-shadow: 0 0 15px var(--crimson-glow);
}

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

.btn-secondary:hover {
    border-color: var(--text-muted);
    background: #1f1f24;
}

.auth-msg {
    text-align: center;
    font-size: 0.78rem;
    color: #ef4444;
    min-height: 18px;
}

/* --- UKŁAD CZATU --- */
.chat-layout {
    display: flex;
    height: 100vh;
    width: 100vw;
}

.sidebar {
    width: 290px;
    min-width: 260px;
    background: var(--bg-panel);
    border-right: 1px solid var(--border-dim);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 18px 16px;
    border-bottom: 1px solid var(--border-dim);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar-box {
    width: 34px;
    height: 34px;
    background: var(--bg-pure);
    border: 1px solid var(--crimson-main);
    color: var(--crimson-bright);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.user-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.my-username {
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

.e2ee-status {
    font-size: 0.62rem;
    color: var(--text-muted);
    letter-spacing: 0.08em;
}

.btn-logout {
    background: transparent;
    border: 1px solid var(--border-dim);
    color: var(--text-muted);
    padding: 6px 10px;
    font-size: 0.68rem;
    font-family: inherit;
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-logout:hover {
    color: var(--text-primary);
    border-color: var(--crimson-main);
}

.sidebar-section-title {
    padding: 14px 16px 8px;
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.jp-sub {
    color: var(--text-jp);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
}

.user-list {
    list-style: none;
    flex: 1;
    overflow-y: auto;
    padding: 6px 12px;
}

.user-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 11px 12px;
    border: 1px solid transparent;
    border-left: 2px solid transparent;
    cursor: pointer;
    margin-bottom: 4px;
    font-size: 0.85rem;
    transition: all 0.15s;
}

.user-item:hover {
    background: var(--bg-elevated);
    border-color: var(--border-dim);
}

.user-item.active {
    background: #18080b;
    border: 1px solid var(--border-crimson);
    border-left: 3px solid var(--crimson-bright);
    color: var(--text-primary);
}

.status-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: #3f3f46;
    margin-right: 10px;
    vertical-align: middle;
}

.status-dot.online {
    background: var(--crimson-bright);
    box-shadow: 0 0 8px var(--crimson-bright);
}

.badge-e2ee {
    font-size: 0.62rem;
    letter-spacing: 0.08em;
    padding: 2px 6px;
    border: 1px solid var(--border-dim);
    color: var(--text-muted);
}

/* --- STOPKA KLUCZY E2EE --- */
.sidebar-footer {
    padding: 14px 16px;
    border-top: 1px solid var(--border-dim);
    background: var(--bg-pure);
}

.footer-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    margin-bottom: 10px;
}

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

.btn-tool {
    flex: 1;
    padding: 9px 0;
    font-family: inherit;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    background: var(--bg-panel);
    border: 1px solid var(--border-dim);
    cursor: pointer;
    transition: all 0.15s;
}

.btn-tool:hover {
    border-color: var(--crimson-bright);
    background: #18080b;
}

/* --- GŁÓWNE OKNO CZATU --- */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-pure);
}

.chat-header {
    padding: 18px 24px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-dim);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-title {
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.08em;
}

.header-jp {
    font-size: 0.75rem;
    color: var(--text-jp);
    letter-spacing: 0.2em;
}

.messages-area {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.msg {
    max-width: 70%;
    padding: 12px 16px;
    font-size: 0.88rem;
    line-height: 1.5;
    word-wrap: break-word;
    border: 1px solid var(--border-dim);
}

.msg.me {
    align-self: flex-end;
    background: #1c080c;
    border-color: var(--crimson-main);
    border-right: 3px solid var(--crimson-bright);
    color: var(--text-primary);
}

.msg.other {
    align-self: flex-start;
    background: var(--bg-panel);
    border-left: 3px solid var(--text-muted);
    color: var(--text-primary);
}

.msg-meta {
    display: block;
    font-size: 0.62rem;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    margin-top: 6px;
    text-align: right;
}

.chat-input-bar {
    padding: 16px 24px;
    background: var(--bg-panel);
    border-top: 1px solid var(--border-dim);
    display: flex;
    gap: 12px;
}

.chat-input-bar input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-dim);
    background: var(--bg-pure);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.88rem;
    outline: none;
    transition: border-color 0.2s;
}

.chat-input-bar input:focus {
    border-color: var(--crimson-bright);
}

.btn-send {
    padding: 0 24px;
    background: var(--crimson-main);
    color: var(--text-primary);
    border: 1px solid var(--crimson-bright);
    font-family: inherit;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-send:hover:not(:disabled) {
    background: var(--crimson-bright);
}

.btn-send:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    border-color: var(--border-dim);
    background: var(--bg-elevated);
}

/* --- MODAL EKSPORTU KLUCZA --- */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.82);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 100;
}

.modal-box {
    background: var(--bg-panel);
    border: 1px solid var(--crimson-main);
    width: 100%;
    max-width: 480px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--crimson-bright);
}

.btn-close-modal {
    background: transparent;
    border: 1px solid var(--border-dim);
    color: var(--text-muted);
    padding: 4px 8px;
    font-size: 0.65rem;
    font-family: inherit;
    cursor: pointer;
}

.modal-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.key-textarea {
    width: 100%;
    height: 130px;
    background: var(--bg-pure);
    border: 1px solid var(--border-dim);
    color: var(--text-primary);
    font-family: monospace;
    font-size: 0.72rem;
    padding: 10px;
    resize: none;
    outline: none;
}

.modal-actions {
    display: flex;
    gap: 10px;
}

/* --- RESPONSYWNOŚĆ --- */
@media (max-width: 680px) {
    .chat-layout {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-dim);
    }
    .chat-main {
        height: 60vh;
    }
}

.key-textarea:focus {
    border-color: var(--crimson-bright);
}

/* --- WYSZUKIWARKA KONTAKTÓW, TARCZA PQC I PANEL ADMINA --- */
.header-btns {
    display: flex;
    gap: 6px;
}

.search-box-wrap {
    padding: 0 12px 8px;
}

#user-search-input {
    width: 100%;
    padding: 9px 12px;
    background: var(--bg-pure);
    border: 1px solid var(--border-dim);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    outline: none;
    transition: border-color 0.15s;
}

#user-search-input:focus {
    border-color: var(--crimson-bright);
}

.user-item-right {
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-admin-mini {
    background: transparent;
    border: 1px solid var(--border-dim);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.58rem;
    padding: 2px 5px;
    cursor: pointer;
    letter-spacing: 0.05em;
    transition: all 0.15s;
}

.btn-admin-mini:hover {
    border-color: var(--crimson-bright);
    color: var(--text-primary);
    background: #2a080e;
}

.header-right-tools {
    display: flex;
    align-items: center;
    gap: 14px;
}

.btn-pqc {
    background: var(--bg-pure);
    border: 1px solid var(--border-dim);
    color: var(--text-muted);
    padding: 5px 10px;
    font-family: inherit;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-pqc.active {
    border-color: var(--crimson-bright);
    color: var(--text-primary);
    background: #24070c;
    box-shadow: 0 0 10px var(--crimson-glow);
}

.modal-input {
    padding: 12px 14px;
    border: 1px solid var(--border-dim);
    background: var(--bg-pure);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    outline: none;
}

.modal-input:focus {
    border-color: var(--crimson-bright);
}

/* --- JAPOŃSKIE SCENERIE W TLE CZATU (SAKURA / SAMURAJ / TORII) --- */
.chat-stage {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-pure);
}

.wallpaper-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.38;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    overflow: hidden;
}

.wallpaper-layer svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.messages-area {
    position: relative;
    z-index: 1;
}

.msg {
    backdrop-filter: blur(4px);
}