/* ── Design Tokens ──────────────────────────────────────── */
/* LogicFlow: Code Review Assistant — Stylesheet
 * Built with accessibility-first design: WCAG 2.1 AA compliance,
 * prefers-reduced-motion support, and screen-reader-only utilities. */

:root {
    --bg-dark: #0a0a0f;
    --primary: #6366f1;
    --primary-glow: rgba(99, 102, 241, 0.4);
    --secondary: #a855f7;
    --secondary-glow: rgba(168, 85, 247, 0.3);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(20, 25, 40, 0.5);
    --glass-border: rgba(255, 255, 255, 0.08);
    --bot-msg: rgba(99, 102, 241, 0.15);
    --user-msg: rgba(168, 85, 247, 0.15);

    /* Responsive scale tokens (overridden per breakpoint) */
    --header-size: 2.8rem;
    --sub-size: 1.1rem;
    --bubble-size: 1.05rem;
    --sidebar-width: 280px;
    --gap: 1.5rem;
    --chat-padding: 2rem;
}

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

/* ── Accessibility: Skip Navigation ────────────────────── */
.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: white;
    border-radius: 0 0 8px 8px;
    font-weight: 600;
    z-index: 9999;
    text-decoration: none;
    transition: top 0.2s;
}
.skip-link:focus {
    top: 0;
}

/* ── Accessibility: Screen Reader Only ─────────────────── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ── Animated Background ────────────────────────────────── */
.background-blobs {
    position: fixed; top: 0; left: 0;
    width: 100vw; height: 100vh;
    z-index: -1; overflow: hidden; pointer-events: none;
}
.blob {
    position: absolute; filter: blur(90px); border-radius: 50%;
    animation: float 12s infinite alternate ease-in-out;
}
.blob-1 { width: 450px; height: 450px; background: var(--primary-glow); top: -100px; left: -100px; animation-delay: 0s; }
.blob-2 { width: 550px; height: 550px; background: var(--secondary-glow); bottom: -150px; right: -100px; animation-delay: -5s; }

@keyframes float {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(20px, 40px) scale(1.05); }
    100% { transform: translate(-20px, 60px) scale(0.95); }
}

/* ── Layout ─────────────────────────────────────────────── */
.layout-wrapper {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--gap);
    width: 100%;
    max-width: 1600px;
    height: 100vh;
    position: relative;
    z-index: 1;
    padding: 1rem;
    overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 1.5rem;
    overflow-y: auto;
    min-height: 0;
    scrollbar-width: none;
}
.sidebar::-webkit-scrollbar { display: none; }

.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.sidebar-section h3 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.4rem;
}

.sidebar-section ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.sidebar-section li {
    font-size: 0.88rem;
    color: #e2e8f0;
    background: rgba(255,255,255,0.03);
    padding: 0.6rem 0.8rem;
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.05);
    transition: background 0.2s;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sidebar-section li:hover { background: rgba(255,255,255,0.08); }
.sidebar-section li.active-session {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
    color: white;
    font-weight: 600;
}
.sidebar-section li.empty-state {
    background: transparent; border: none;
    color: var(--text-muted); font-style: italic; cursor: default;
}
.sidebar-section li.empty-state:hover { background: transparent; }

.log-section { flex: 1; min-height: 120px; }

.agent-log-console {
    flex: 1;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.75rem;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.78rem;
    color: #4ade80;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.2) transparent;
}
.agent-log-console::-webkit-scrollbar { width: 4px; }
.agent-log-console::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 2px; }

/* ── Main App Container ──────────────────────────────────── */
.app-container {
    width: 100%;
    height: 100%;
    min-height: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* ── Glass Card ─────────────────────────────────────────── */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* ── Header ─────────────────────────────────────────────── */
header {
    text-align: center;
    flex-shrink: 0;
    padding-top: 0.25rem;
    position: relative;
}

.header-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

header h1 {
    font-size: var(--header-size);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

header h1 span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-toggle {
    display: none;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: white;
    padding: 0.6rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
}

header p { color: var(--text-muted); font-size: var(--sub-size); margin-top: 0.2rem; }

/* ── Context Panel (Sidebar version) ───────────────────── */
.context-section .context-panel {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 0;
    margin-top: 0.5rem;
}

.context-section select {
    width: 100%;
    background: rgba(0, 0, 0, 0.4);
    color: white;
    border: 1px solid var(--glass-border);
    padding: 0.7rem 1rem;
    border-radius: 10px;
    outline: none;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.context-section select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 12px var(--primary-glow);
}

.export-btn-sidebar {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    padding: 0.7rem 1rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
}

.export-btn-sidebar:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-1px);
}

.new-chat-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    padding: 0.7rem 1rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 0.25rem;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    transition: all 0.2s;
}

.new-chat-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(168, 85, 247, 0.4);
}

.new-chat-btn:active {
    transform: translateY(0);
}

/* ── Chat Container ─────────────────────────────────────── */
.chat-container {
    flex: 1 1 0;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--chat-padding);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    scroll-behavior: smooth;
}

.chat-container > * {
    max-width: 900px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
}

.chat-container::-webkit-scrollbar { width: 6px; }
.chat-container::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 3px; }

/* ── Messages ───────────────────────────────────────────── */
.message {
    display: flex;
    gap: 1rem;
    width: 100%;
    margin-bottom: 0.5rem;
    animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    position: relative;
}
.message.user { flex-direction: row-reverse; }
.message.system { align-self: flex-start; }

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

.avatar {
    width: 40px; height: 40px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; flex-shrink: 0;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.message.user .avatar { background: linear-gradient(135deg, var(--secondary), #d8b4fe); color: #fff; }
.message.system .avatar { background: linear-gradient(135deg, var(--primary), #a5b4fc); color: #fff; }

.bubble {
    padding: 1rem 1.3rem;
    border-radius: 16px;
    font-size: var(--bubble-size);
    line-height: 1.65;
    color: #f1f5f9;
    word-break: break-word;
    flex: 1;
    max-width: 85%;
}
.message.system .bubble { background: var(--bot-msg); border-top-left-radius: 4px; }
.message.user .bubble { background: var(--user-msg); border-top-right-radius: 4px; align-self: flex-end; }

/* Code blocks inside bubbles */
.bubble pre { background: rgba(0,0,0,0.4) !important; padding: 1rem; border-radius: 10px; overflow-x: auto; margin-top: 0.8rem; border: 1px solid var(--glass-border); }
.bubble p { margin-bottom: 0.75rem; }
.bubble p:last-child { margin-bottom: 0; }
.bubble code { font-family: 'Courier New', Courier, monospace; font-size: 0.88em; background: rgba(0,0,0,0.3); padding: 0.15rem 0.35rem; border-radius: 4px; }
.bubble h1, .bubble h2, .bubble h3 { margin-top: 0.9rem; margin-bottom: 0.4rem; border-bottom: 1px solid var(--glass-border); padding-bottom: 0.25rem; }
.bubble ul, .bubble ol { margin-left: 1.4rem; margin-bottom: 0.8rem; }
.bubble li { margin-bottom: 0.25rem; }

/* Code block Copy button */
.copy-code-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #94a3b8;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.7rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s;
}

.copy-code-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* ── Export Button (per message) ────────────────────────── */
.export-btn {
    position: absolute;
    top: -28px;
    right: 0;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--text-muted);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.78rem;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.2s;
    opacity: 0;
    white-space: nowrap;
}
.message:hover .export-btn { opacity: 1; }
.export-btn:hover { background: var(--primary); color: white; border-color: var(--primary); }

/* ── Input Panel ─────────────────────────────────────────── */
.input-panel {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    padding: 1.25rem 2rem;
    flex-shrink: 0;
    background: transparent;
    border: none;
    box-shadow: none;
}

.input-panel > * {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
}

.input-panel #github-url, 
.input-panel .input-container {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.input-panel .input-container {
    padding: 0 1.2rem;
}

#github-url {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: white;
    padding: 0.55rem 1rem;
    font-family: inherit;
    font-size: 0.88rem;
    outline: none;
    width: 100%;
    transition: border-color 0.2s;
}
#github-url:focus { border-color: var(--primary); }
#github-url::placeholder { color: rgba(255,255,255,0.35); }

.input-container {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-shrink: 0;
}
.input-container input {
    flex: 1; background: transparent; border: none; outline: none;
    color: white; font-size: 1rem; font-family: inherit; padding: 0.7rem 0;
}
.input-container input::placeholder { color: rgba(255,255,255,0.4); }

.input-container button {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white; border: none;
    width: 46px; height: 46px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; flex-shrink: 0;
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}
.input-container button:hover { transform: scale(1.1); box-shadow: 0 6px 20px rgba(168, 85, 247, 0.6); }
.input-container button:active { transform: scale(0.95); }

/* ── Typing Indicator ───────────────────────────────────── */
.typing-indicator { display: none; gap: 4px; padding: 0.75rem 0; align-self: flex-start; }
.typing-indicator.active { display: flex; }
.dot { width: 8px; height: 8px; background: #a5b4fc; border-radius: 50%; animation: bounce 1.4s infinite ease-in-out both; }
.dot:nth-child(1) { animation-delay: -0.32s; }
.dot:nth-child(2) { animation-delay: -0.16s; }
@keyframes bounce { 0%, 80%, 100% { transform: scale(0); opacity: 0.3; } 40% { transform: scale(1); opacity: 1; } }

/* ── Accessibility ──────────────────────────────────────── */
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ── Input Meta Bar ────────────────────────────────────── */
.input-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 0 0.5rem;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
}
.char-count { font-variant-numeric: tabular-nums; }
.char-count.over-limit { color: #f87171; font-weight: 600; }
.shortcut-hint { opacity: 0.5; }
.shortcut-hint kbd {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 3px;
    padding: 1px 5px;
    font-size: 0.7rem;
    font-family: inherit;
}

/* ── Agent Log Stats Widget ────────────────────────────── */
.stats-widget {
    margin-top: 6px;
    padding: 6px 8px;
    background: rgba(99,102,241,0.15);
    border-radius: 6px;
    border: 1px solid rgba(99,102,241,0.3);
    line-height: 1.7;
}
.stat-time { color: #a5b4fc; font-weight: 600; }
.stat-in { color: #86efac; }
.stat-out { color: #fda4af; }
.stat-total { color: #94a3b8; }

/* ── Task Active Dot ───────────────────────────────────── */
.task-active-dot { color: #a855f7; }


/* ══════════════════════════════════════════════════════════
   RESPONSIVE BREAKPOINTS
   ══════════════════════════════════════════════════════════ */

/* ── Mobile  (< 640px) ───────────────────────────────────── */
@media (max-width: 639px) {
    :root {
        --header-size: 1.7rem;
        --sub-size: 0.85rem;
        --bubble-size: 0.95rem;
        --chat-padding: 1rem;
        --gap: 0.6rem;
    }

    html, body { overflow: hidden; }

    .layout-wrapper {
        grid-template-columns: 1fr;
        height: 100dvh;
        padding: 0;
        gap: 0;
        max-width: 100%;
        overflow: visible; /* To allow sidebar to slide out */
    }

    .sidebar {
        position: fixed;
        top: 0;
        right: -300px; /* Hidden off-screen */
        width: 280px;
        height: 100vh;
        z-index: 1000;
        transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        border-radius: 20px 0 0 20px;
        box-shadow: -10px 0 30px rgba(0,0,0,0.5);
    }

    .layout-wrapper.sidebar-open .sidebar {
        right: 0;
    }

    /* Mobile Backdrop */
    .layout-wrapper.sidebar-open::after {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0,0,0,0.6);
        backdrop-filter: blur(4px);
        z-index: 999;
    }

    .sidebar-toggle {
        display: flex;
        position: absolute;
        right: 1rem;
        z-index: 1001;
    }

    .app-container { gap: 0.5rem; border-radius: 0; }

    header { padding: 0.6rem 1rem 0.4rem; }
    header h1 { font-size: 1.5rem; text-align: left; max-width: calc(100% - 60px); }
    header p { font-size: 0.78rem; text-align: left; }
    .header-content { justify-content: flex-start; }

    .glass { border-radius: 12px; }
    .layout-wrapper > .app-container > .glass { border-radius: 0; }

    .context-panel {
        padding: 0.6rem 1rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    .context-panel h2 { font-size: 0.9rem; }
    .context-panel select { font-size: 0.85rem; padding: 0.5rem 0.8rem; width: 100%; }

    .message { max-width: 95%; gap: 0.6rem; }
    .avatar { width: 32px; height: 32px; font-size: 1rem; }
    .bubble { padding: 0.75rem 1rem; font-size: 0.92rem; }

    .input-panel { padding: 0.5rem 0.75rem 0.75rem; gap: 0.35rem; }
    #github-url { font-size: 0.82rem; padding: 0.5rem 0.75rem; }
    .input-container input { font-size: 0.92rem; }
    .input-container button { width: 40px; height: 40px; }
    .input-container button svg { width: 16px; height: 16px; }

    .export-btn { display: none; } /* tap-unfriendly on mobile */
}

/* ── Tablet  (640px – 1023px) ───────────────────────────── */
@media (min-width: 640px) and (max-width: 1023px) {
    :root {
        --header-size: 2.1rem;
        --sub-size: 0.95rem;
        --bubble-size: 1rem;
        --chat-padding: 1.5rem;
        --gap: 1rem;
        --sidebar-width: 240px;
    }

    .layout-wrapper {
        grid-template-columns: 1fr;   /* sidebar hidden on tablet too */
        height: 100dvh;
        padding: 0.75rem;
        gap: 0.75rem;
        max-width: 100%;
    }

    .sidebar { display: none; }

    .app-container { gap: 0.75rem; }

    .context-panel { padding: 0.8rem 1.2rem; }
    .context-panel select { font-size: 0.9rem; }

    .message { max-width: 90%; }
    .avatar { width: 36px; height: 36px; font-size: 1.1rem; }

    .input-panel { padding: 0.65rem 1rem 0.85rem; }
    .input-container button { width: 44px; height: 44px; }
}

/* ── Laptop  (1024px – 1439px) ──────────────────────────── */
@media (min-width: 1024px) and (max-width: 1439px) {
    :root {
        --header-size: 2.4rem;
        --sub-size: 1rem;
        --bubble-size: 1rem;
        --chat-padding: 1.75rem;
        --sidebar-width: 260px;
        --gap: 1.25rem;
    }

    .layout-wrapper {
        max-width: 1200px;
        padding: 0.85rem;
        gap: var(--gap);
    }

    .sidebar { display: flex; padding: 1.25rem; }
    .sidebar-section h3 { font-size: 0.82rem; }
    .sidebar-section li { font-size: 0.85rem; }
    .agent-log-console { font-size: 0.76rem; }
}

/* ── Desktop / Large Laptop  (1440px – 1919px)  ─────────── */
@media (min-width: 1440px) and (max-width: 1919px) {
    :root {
        --header-size: 2.8rem;
        --sub-size: 1.1rem;
        --bubble-size: 1.05rem;
        --chat-padding: 2rem;
        --sidebar-width: 280px;
        --gap: 1.5rem;
    }

    .layout-wrapper { max-width: 1400px; padding: 1rem; }
    .sidebar { display: flex; }
}

/* ── TV / Ultra-wide  (≥ 1920px) ────────────────────────── */
@media (min-width: 1920px) {
    :root {
        --header-size: 3.6rem;
        --sub-size: 1.35rem;
        --bubble-size: 1.2rem;
        --chat-padding: 2.5rem;
        --sidebar-width: 340px;
        --gap: 2rem;
    }

    html, body { font-size: 18px; }

    .layout-wrapper {
        max-width: 1800px;
        padding: 1.5rem;
        gap: var(--gap);
    }

    .sidebar { display: flex; padding: 2rem; gap: 2rem; }
    .sidebar-section h3 { font-size: 1rem; }
    .sidebar-section li { font-size: 1rem; padding: 0.75rem 1rem; }
    .agent-log-console { font-size: 0.9rem; }

    .context-panel { padding: 1.4rem 2rem; }
    .context-panel h2 { font-size: 1.4rem; }
    .context-panel select { font-size: 1.1rem; padding: 0.8rem 1.4rem; }

    .avatar { width: 52px; height: 52px; font-size: 1.5rem; }
    .bubble { padding: 1.4rem 1.8rem; }

    .input-panel { padding: 1rem 1.75rem 1.25rem; }
    .input-container input { font-size: 1.2rem; }
    .input-container button { width: 58px; height: 58px; }
    .input-container button svg { width: 24px; height: 24px; }

    .glass { border-radius: 24px; }
}