/* ============================================
   SecureBot CTF — Hacker Terminal Theme
   ============================================ */

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

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1520;
    --bg-tertiary: #141c2b;
    --bg-card: #111827;
    --bg-input: #0d1219;

    --green-primary: #00ff88;
    --green-dim: #00cc6a;
    --green-glow: rgba(0, 255, 136, 0.15);
    --green-subtle: rgba(0, 255, 136, 0.06);

    --cyan-primary: #00e5ff;
    --cyan-dim: #00b8d4;
    --cyan-glow: rgba(0, 229, 255, 0.12);

    --magenta-primary: #ff00aa;
    --magenta-glow: rgba(255, 0, 170, 0.1);

    --text-primary: #e0e6f0;
    --text-secondary: #8892a8;
    --text-dim: #4a5568;

    --border-color: rgba(0, 255, 136, 0.12);
    --border-active: rgba(0, 255, 136, 0.3);

    --red-primary: #ff3b5c;
    --yellow-primary: #ffd600;

    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --font-display: 'Orbitron', sans-serif;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --shadow-glow: 0 0 20px rgba(0, 255, 136, 0.08);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
}

html, body {
    height: 100%;
    overflow: hidden;
    font-family: var(--font-mono);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.6;
}

/* --- Background Effects --- */
.scanlines {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 9999;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.03) 2px,
        rgba(0, 0, 0, 0.03) 4px
    );
}

.grid-bg {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 0;
    background-image:
        linear-gradient(rgba(0, 255, 136, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 136, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* --- App Container --- */
.app-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 900px;
    margin: 0 auto;
}

/* --- Header --- */
.header {
    flex-shrink: 0;
    padding: 16px 20px 0;
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-icon {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 900;
    color: var(--green-primary);
    text-shadow: 0 0 12px var(--green-glow);
    letter-spacing: 2px;
}

.logo-bracket {
    color: var(--text-dim);
    font-weight: 400;
}

.logo-title {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    color: var(--green-primary);
    letter-spacing: 3px;
    text-transform: uppercase;
    text-shadow: 0 0 10px var(--green-glow);
}

.logo-subtitle {
    display: block;
    font-size: 10px;
    color: var(--text-dim);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-top: 2px;
}

.header-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green-primary);
    box-shadow: 0 0 8px var(--green-primary);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.status-text {
    font-size: 11px;
    font-weight: 500;
    color: var(--green-dim);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* --- Challenge Banner --- */
.challenge-banner {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 14px;
    padding: 12px 16px;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-glow);
}

.challenge-icon {
    font-size: 22px;
    color: var(--cyan-primary);
    text-shadow: 0 0 10px var(--cyan-glow);
    flex-shrink: 0;
}

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

.challenge-label {
    display: block;
    font-family: var(--font-display);
    font-size: 10px;
    font-weight: 700;
    color: var(--cyan-primary);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 3px;
}

.challenge-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.challenge-difficulty {
    flex-shrink: 0;
    text-align: center;
}

.diff-label {
    display: block;
    font-size: 9px;
    color: var(--text-dim);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.diff-bars {
    display: flex;
    gap: 3px;
}

.diff-bar {
    width: 12px;
    height: 4px;
    border-radius: 2px;
    background: var(--text-dim);
    opacity: 0.3;
    transition: all 0.3s ease;
}

.diff-bar.active {
    background: var(--yellow-primary);
    opacity: 1;
    box-shadow: 0 0 6px rgba(255, 214, 0, 0.4);
}

/* --- Chat Area --- */
.chat-area {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
    scroll-behavior: smooth;
}

.chat-area::-webkit-scrollbar {
    width: 6px;
}

.chat-area::-webkit-scrollbar-track {
    background: transparent;
}

.chat-area::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.chat-area::-webkit-scrollbar-thumb:hover {
    background: var(--border-active);
}

/* --- Messages --- */
.messages-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    display: flex;
    gap: 12px;
    animation: message-in 0.35s ease-out;
}

@keyframes message-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-avatar {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
}

.bot-message .message-avatar {
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.15), rgba(0, 229, 255, 0.1));
    color: var(--green-primary);
    border: 1px solid var(--border-color);
}

.user-message .message-avatar {
    background: linear-gradient(135deg, rgba(255, 0, 170, 0.15), rgba(120, 0, 255, 0.1));
    color: var(--magenta-primary);
    border: 1px solid rgba(255, 0, 170, 0.2);
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.message-author {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.bot-message .message-author {
    color: var(--green-primary);
}

.user-message .message-author {
    color: var(--magenta-primary);
}

.message-time {
    font-size: 10px;
    color: var(--text-dim);
}

.message-text {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 13px;
    line-height: 1.7;
    word-wrap: break-word;
}

.bot-message .message-text {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--green-dim);
}

.user-message .message-text {
    background: linear-gradient(135deg, rgba(255, 0, 170, 0.06), rgba(120, 0, 255, 0.04));
    border: 1px solid rgba(255, 0, 170, 0.12);
    border-left: 3px solid var(--magenta-primary);
}

.message-text p {
    margin-bottom: 8px;
}

.message-text p:last-child {
    margin-bottom: 0;
}

.message-text strong {
    color: var(--green-primary);
    font-weight: 600;
}

.message-text em {
    color: var(--text-secondary);
}

.message-text code {
    background: rgba(0, 255, 136, 0.08);
    color: var(--cyan-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
}

.hint-text {
    margin-top: 8px;
    padding: 8px 12px;
    background: rgba(0, 229, 255, 0.06);
    border: 1px solid rgba(0, 229, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: 12px;
}

/* Filtered message style */
.filtered-message .message-text {
    border-left-color: var(--yellow-primary);
    background: rgba(255, 214, 0, 0.04);
    border-color: rgba(255, 214, 0, 0.15);
}

/* --- Typing Indicator --- */
.typing-indicator {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
}

.typing-indicator.visible {
    display: flex;
}

.typing-dots {
    display: flex;
    gap: 4px;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.typing-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green-dim);
    animation: typing-bounce 1.4s ease-in-out infinite;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing-bounce {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.3;
    }
    30% {
        transform: translateY(-6px);
        opacity: 1;
    }
}

/* --- Input Area --- */
.input-area {
    flex-shrink: 0;
    padding: 12px 20px 16px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 4px 4px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-wrapper:focus-within {
    border-color: var(--green-dim);
    box-shadow: 0 0 0 3px var(--green-glow), var(--shadow-glow);
}

.input-prefix {
    flex-shrink: 0;
}

.prompt-symbol {
    color: var(--green-primary);
    font-weight: 700;
    font-size: 16px;
    text-shadow: 0 0 8px var(--green-glow);
}

.message-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 10px 0;
    caret-color: var(--green-primary);
}

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

.input-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.char-count {
    font-size: 10px;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}

.char-count.warning {
    color: var(--yellow-primary);
}

.char-count.danger {
    color: var(--red-primary);
}

.send-btn {
    width: 38px;
    height: 38px;
    border: none;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--green-dim), var(--green-primary));
    color: var(--bg-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.send-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 16px var(--green-glow);
}

.send-btn:active {
    transform: scale(0.95);
}

.send-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* --- Input Footer --- */
.input-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 8px;
    padding: 0 4px;
}

.reset-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 11px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.reset-btn:hover {
    color: var(--red-primary);
    border-color: rgba(255, 59, 92, 0.3);
    background: rgba(255, 59, 92, 0.06);
}

.footer-info {
    font-size: 10px;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}

/* --- Error Toast --- */
.error-toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    background: rgba(255, 59, 92, 0.12);
    border: 1px solid rgba(255, 59, 92, 0.3);
    border-radius: var(--radius-sm);
    color: var(--red-primary);
    font-family: var(--font-mono);
    font-size: 12px;
    z-index: 1000;
    animation: toast-in 0.3s ease-out;
    max-width: 350px;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* --- Responsive --- */
@media (max-width: 640px) {
    .app-container {
        max-width: 100%;
    }

    .header {
        padding: 12px 14px 0;
    }

    .challenge-banner {
        flex-wrap: wrap;
        gap: 10px;
    }

    .challenge-difficulty {
        flex-basis: 100%;
        text-align: left;
    }

    .diff-label {
        display: inline;
        margin-right: 8px;
    }

    .diff-bars {
        display: inline-flex;
    }

    .chat-area {
        padding: 12px 14px;
    }

    .input-area {
        padding: 10px 14px 14px;
    }

    .footer-info {
        display: none;
    }
}