/* STEALTH CHAT - Minimalist Dark Cyber Theme */
:root {
    --bg-main: #0c0d10;
    --bg-card: #14161b;
    --bg-card-subtle: #191c24;
    --bg-input: #0a0b0e;
    --border-color: #262a36;
    --border-accent: #3b4254;
    --text-primary: #e6e8ec;
    --text-secondary: #8c93a4;
    --text-muted: #535969;
    --accent: #00ff9d;
    --accent-dim: rgba(0, 255, 157, 0.15);
    --warning: #ffb84d;
    --danger: #ff4757;
    --danger-dim: rgba(255, 71, 87, 0.15);
    --font-mono: 'SF Mono', 'Fira Code', 'Roboto Mono', 'Cascadia Code', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
}

.stealth-container {
    width: 100%;
    max-width: 680px;
    height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    padding: 16px;
}

@media (min-width: 720px) {
    .stealth-container {
        height: 85vh;
        max-height: 850px;
        border: 1px solid var(--border-color);
        border-radius: 12px;
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
        padding: 24px;
        background: radial-gradient(circle at top right, rgba(16, 20, 28, 0.8), var(--bg-main));
    }
}

/* Panel management */
.view-panel {
    display: none;
    height: 100%;
    flex-direction: column;
}

.view-panel.active {
    display: flex;
}

/* Landing Screen */
#landing-screen {
    justify-content: center;
    align-items: center;
}

.brand-header {
    text-align: center;
    margin-bottom: 28px;
}

.pulse-indicator {
    width: 10px;
    height: 10px;
    background-color: var(--accent);
    border-radius: 50%;
    margin: 0 auto 12px;
    box-shadow: 0 0 12px var(--accent);
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; transform: scale(0.9); }
    50% { opacity: 1; transform: scale(1.1); }
}

.brand-header h1 {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    letter-spacing: 4px;
    font-weight: 700;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 6px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.glass-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    width: 100%;
    max-width: 440px;
}

.form-group {
    margin-bottom: 18px;
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-family: var(--font-mono);
}

input[type="text"],
input[type="password"] {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    padding: 12px 14px;
    font-size: 0.95rem;
    font-family: var(--font-mono);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

input[type="text"]:focus,
input[type="password"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
}

.info-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin-bottom: 20px;
    padding: 8px 10px;
    background-color: var(--bg-input);
    border-radius: 4px;
    border-left: 2px solid var(--border-accent);
}

.error-text {
    color: var(--danger);
    font-size: 0.8rem;
    margin-bottom: 14px;
    font-family: var(--font-mono);
}

.btn {
    border: none;
    border-radius: 6px;
    padding: 12px 16px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 1.5px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-main);
    width: 100%;
}

.btn-primary:hover {
    background-color: #ffffff;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

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

.btn-secondary:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

/* Chat Screen */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 12px;
}

.link-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-pill {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: 4px;
    background-color: var(--bg-card-subtle);
    border: 1px solid var(--border-color);
}

.user-pill.my-name {
    color: var(--accent);
    border-color: rgba(0, 255, 157, 0.3);
}

.user-pill.target-name {
    color: var(--text-primary);
}

.link-arrow {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.status-zone {
    display: flex;
    align-items: center;
    gap: 12px;
}

.peer-status {
    display: flex;
    align-items: center;
    gap: 7px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    font-weight: 700;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-muted);
    transition: all 0.25s ease;
}

.peer-status.online .status-dot {
    background-color: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

.peer-status.online {
    color: var(--accent);
}

.btn-icon {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 4px;
    width: 28px;
    height: 28px;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    color: var(--danger);
    border-color: var(--danger);
}



/* Messages container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 8px 0;
}

.empty-state {
    margin: auto;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-mono);
    letter-spacing: 1px;
}

/* Message Item */
.message-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: opacity 0.3s ease, transform 0.3s ease;
    animation: fadeIn 0.25s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-card.outgoing {
    border-left: 3px solid var(--accent);
    background: linear-gradient(90deg, rgba(0, 255, 157, 0.03), var(--bg-card));
}

.message-card.incoming {
    border-left: 3px solid var(--border-accent);
}

.message-card.system-msg {
    border-left: 3px solid var(--danger);
    background: rgba(255, 71, 87, 0.03);
}

.system-error-body, .sys-body {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.system-error-body .sys-tag, .sys-body .sys-tag {
    color: var(--danger);
    font-weight: 600;
}

.msg-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.7rem;
    font-family: var(--font-mono);
}

.msg-sender {
    color: var(--text-secondary);
    font-weight: 600;
}

.msg-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
}

.msg-countdown {
    color: var(--warning);
    font-size: 0.65rem;
}

.msg-body {
    font-size: 0.95rem;
    line-height: 1.45;
    word-break: break-word;
    color: var(--text-primary);
}

/* Locked message layout */
.locked-body {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
}

.locked-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    color: var(--warning);
    font-size: 0.85rem;
}

.btn-unlock {
    background-color: rgba(255, 184, 77, 0.15);
    border: 1px solid var(--warning);
    color: var(--warning);
    padding: 5px 12px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    letter-spacing: 1px;
}

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

/* Footer / Input dock */
.chat-footer {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.lock-controls {
    background: var(--bg-card);
    border: 1px dashed var(--warning);
    border-radius: 6px;
    padding: 10px 12px;
    animation: fadeIn 0.2s ease;
}

.lock-header {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 8px;
}

.lock-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--warning);
    font-weight: 700;
    letter-spacing: 1px;
}

.lock-desc {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.message-form {
    display: flex;
    gap: 8px;
    align-items: center;
}

.btn-toggle {
    background: var(--bg-card-subtle);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.2s;
}

.btn-toggle.active {
    border-color: var(--warning);
    background-color: rgba(255, 184, 77, 0.12);
}

.message-form input[type="text"] {
    flex: 1;
    height: 44px;
}

.btn-send {
    height: 44px;
    padding: 0 20px;
    background-color: var(--text-primary);
    color: var(--bg-main);
    border-radius: 6px;
}

.prefix-hint {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-align: center;
    letter-spacing: 0.5px;
}

/* Modals */
.modal-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(6, 7, 9, 0.85);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 100;
}

.modal-content {
    max-width: 400px;
    width: 100%;
    text-align: center;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 10px;
}

.modal-header h3 {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    letter-spacing: 1px;
}

.modal-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 18px;
}

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

.modal-actions .btn {
    flex: 1;
}

.decrypted-box {
    background-color: var(--bg-input);
    border: 1px solid var(--accent);
    padding: 16px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 1.05rem;
    color: var(--accent);
    margin-bottom: 16px;
    word-break: break-word;
    text-align: left;
}

.burn-note {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--danger);
    margin-bottom: 18px;
}

/* Trap overlay: looks like an authentic cold server error */
.trap-overlay {
    background-color: #050608;
    z-index: 999;
}

.trap-box {
    text-align: center;
    max-width: 360px;
}

.server-error-code {
    font-family: var(--font-mono);
    color: var(--danger);
    font-size: 1.4rem;
    letter-spacing: 4px;
    margin-bottom: 10px;
    font-weight: 700;
}

.trap-box h2 {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hidden {
    display: none !important;
}