/* ============================
   CHAT APP PAGE — BRUTALIST (chat.html)
   ============================ */

:root {
    --black: #000000;
    --white: #FFFFFF;
    --off-white: #F0F0F0;
    --gray: #888888;
    --dark-gray: #1A1A1A;
    --mid-gray: #333333;
    --accent: #CCFF00;
    --accent-hot: #FF4D00;
    --font-display: 'Bebas Neue', Impact, sans-serif;
    --font-body: 'JetBrains Mono', 'Courier New', monospace;
    --transition: 0.15s ease;
}

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

body {
    font-family: var(--font-body);
    background: var(--black);
    color: var(--white);
    overflow: hidden;
    height: 100vh;
}

/* APP LAYOUT */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ============================
   SIDEBAR
   ============================ */
.sidebar {
    width: 280px;
    background: var(--dark-gray);
    border-right: 3px solid var(--white);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 2px solid var(--mid-gray);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--white);
    margin-bottom: 16px;
}

.sidebar-logo .logo-icon {
    width: 32px;
    height: 32px;
    border: 2px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-logo .logo-icon svg {
    stroke: var(--accent);
}

.sidebar-logo span:last-child {
    font-family: var(--font-display);
    font-size: 1.3rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.sidebar-logo:hover {
    color: var(--accent);
}

.new-chat-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px 16px;
    border: 2px solid var(--accent);
    background: transparent;
    color: var(--accent);
    font-family: var(--font-body);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    cursor: pointer;
    transition: all var(--transition);
}

.new-chat-btn svg {
    stroke: var(--accent);
}

.new-chat-btn:hover {
    background: var(--accent);
    color: var(--black);
    transform: translate(-2px, -2px);
    box-shadow: 4px 4px 0 var(--accent-hot);
}

.new-chat-btn:hover svg {
    stroke: var(--black);
}

/* SIDEBAR CONTENT */
.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px 0;
}

.sidebar-content::-webkit-scrollbar {
    width: 3px;
}

.sidebar-content::-webkit-scrollbar-track {
    background: var(--dark-gray);
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--mid-gray);
}

.chat-history {
    padding: 0 16px;
}

.history-section {
    margin-bottom: 16px;
}

.history-label {
    display: block;
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--gray);
    padding: 8px 0;
    border-bottom: 1px solid var(--mid-gray);
    margin-bottom: 4px;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    font-size: 0.75rem;
    color: var(--gray);
    cursor: pointer;
    transition: all var(--transition);
    border-left: 2px solid transparent;
}

.history-item svg {
    flex-shrink: 0;
    stroke: var(--gray);
}

.history-item span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-item:hover {
    color: var(--white);
    background: var(--black);
    border-left-color: var(--accent);
}

.history-item:hover svg {
    stroke: var(--accent);
}

.history-item.active {
    color: var(--accent);
    border-left-color: var(--accent);
    background: rgba(204, 255, 0, 0.05);
}

.history-item.active svg {
    stroke: var(--accent);
}

/* SIDEBAR FOOTER */
.sidebar-footer {
    padding: 16px;
    border-top: 2px solid var(--mid-gray);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border: 2px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent);
    background: var(--black);
}

.user-info span {
    font-size: 0.75rem;
    color: var(--gray);
}

.sidebar-links {
    display: flex;
    gap: 16px;
}

.sidebar-links a {
    font-size: 0.65rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-decoration: none;
    transition: color var(--transition);
}

.sidebar-links a:hover {
    color: var(--accent);
}

/* ============================
   MOBILE SIDEBAR TOGGLE
   ============================ */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1001;
    width: 44px;
    height: 44px;
    border: 2px solid var(--white);
    background: var(--black);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.sidebar-toggle svg {
    stroke: var(--white);
}

.sidebar-toggle:hover {
    border-color: var(--accent);
    background: var(--dark-gray);
}

.sidebar-toggle:hover svg {
    stroke: var(--accent);
}

/* ============================
   MAIN CHAT AREA
   ============================ */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--black);
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.chat-container::-webkit-scrollbar {
    width: 4px;
}

.chat-container::-webkit-scrollbar-track {
    background: var(--black);
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--mid-gray);
}

/* EMPTY STATE */
.chat-empty {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    text-align: center;
}

.empty-logo {
    margin-bottom: 24px;
}

.empty-logo svg {
    stroke: var(--accent);
}

.chat-empty h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.5rem);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 12px;
}

.dev-notice {
    margin-bottom: 40px;
    font-size: 0.75rem;
    color: var(--gray);
}

.notice-badge {
    display: inline-block;
    padding: 4px 12px;
    border: 2px solid var(--accent-hot);
    color: var(--accent-hot);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-weight: 700;
    margin-right: 8px;
}

/* SUGGESTION CARDS */
.suggestion-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    max-width: 600px;
    width: 100%;
}

.suggestion-card {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 20px;
    border: 1px solid var(--mid-gray);
    background: var(--dark-gray);
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
}

.suggestion-card:hover {
    border-color: var(--accent);
    background: var(--black);
}

.suggestion-card:hover .card-icon svg {
    stroke: var(--accent);
}

.card-icon {
    flex-shrink: 0;
}

.card-icon svg {
    stroke: var(--gray);
    transition: stroke var(--transition);
}

.card-text strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 2px;
    font-weight: 400;
}

.card-text span {
    font-size: 0.7rem;
    color: var(--gray);
}

/* MESSAGES CONTAINER */
.messages-container {
    flex: 1;
    padding: 24px;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

/* MESSAGE */
.message {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    padding: 20px 0;
    border-bottom: 1px solid var(--mid-gray);
    animation: msgIn 0.3s ease;
}

@keyframes msgIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-avatar {
    width: 36px;
    height: 36px;
    border: 2px solid var(--mid-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.7rem;
    font-weight: 700;
}

.message.user .message-avatar {
    border-color: var(--white);
    color: var(--white);
}

.message.assistant .message-avatar {
    border-color: var(--accent);
    color: var(--accent);
}

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

.message-content p {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--off-white);
}

.message.user .message-content p {
    color: var(--white);
}

.message-content pre {
    background: var(--dark-gray);
    border: 2px solid var(--mid-gray);
    padding: 16px;
    margin: 12px 0;
    overflow-x: auto;
    font-size: 0.8rem;
    color: var(--accent);
}

.message-content code {
    font-family: var(--font-body);
    color: var(--accent);
}

.message-content ul,
.message-content ol {
    margin: 8px 0 8px 20px;
}

.message-content li {
    font-size: 0.85rem;
    color: var(--off-white);
    margin-bottom: 4px;
}

/* TYPING INDICATOR */
.typing-indicator {
    display: flex;
    gap: 5px;
    padding: 4px 0;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background: var(--accent);
    animation: typingPulse 1.2s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* ============================
   INPUT AREA
   ============================ */
.input-area {
    padding: 16px 24px 24px;
    border-top: 3px solid var(--mid-gray);
    background: var(--dark-gray);
}

.input-wrapper {
    display: flex;
    max-width: 800px;
    margin: 0 auto;
    border: 3px solid var(--white);
    background: var(--black);
}

.input-wrapper:focus-within {
    border-color: var(--accent);
}

.input-wrapper textarea {
    flex: 1;
    padding: 14px 16px;
    background: transparent;
    border: none;
    color: var(--white);
    font-family: var(--font-body);
    font-size: 0.85rem;
    outline: none;
    resize: none;
    max-height: 150px;
    line-height: 1.5;
}

.input-wrapper textarea::placeholder {
    color: var(--mid-gray);
}

.send-btn {
    padding: 14px 20px;
    background: var(--accent);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-btn svg {
    fill: var(--black);
}

.send-btn:hover {
    background: var(--accent-hot);
}

.send-btn:hover svg {
    fill: var(--white);
}

.send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.input-disclaimer {
    text-align: center;
    font-size: 0.6rem;
    color: var(--mid-gray);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 10px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        z-index: 1000;
        transform: translateX(-100%);
        transition: transform 0.2s ease;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: flex;
    }

    .suggestion-cards {
        grid-template-columns: 1fr;
    }

    .chat-empty h1 {
        font-size: 2rem;
    }

    .message {
        gap: 12px;
    }

    .input-area {
        padding: 12px 16px 16px;
    }
}

@media (max-width: 480px) {
    .sidebar {
        width: 100%;
    }

    .input-wrapper {
        border-width: 2px;
    }
}