/* ===== ACCESSIBILITY UTILITIES ===== */

/* Skip-to-main-content link — visible only on keyboard focus */
.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    z-index: 9999;
    padding: 0.6rem 1.2rem;
    background: var(--primary, #1a56db);
    color: #fff;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 0 0 0.5rem 0.5rem;
    text-decoration: none;
    transition: top 0.15s ease;
}
.skip-link:focus {
    top: 0;
    outline: 3px solid var(--accent, #ff9933);
    outline-offset: 2px;
}

/* Screen-reader-only text — visually hidden but accessible */
.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;
}

/* Ensure all interactive elements have a visible focus ring */
:focus-visible {
    outline: 2px solid var(--accent, #ff9933);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Respect user's motion preference */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ===== TOKENS ===== */
:root {
    /* India-inspired: Saffron, Navy, Green accent */
    --primary: #1a56db;       /* ECI Navy Blue */
    --primary-light: #4f86f7;
    --primary-dark: #1139a0;
    --accent: #ff9933;        /* Indian Saffron */
    --success: #138808;       /* India Green */
    --warning: #fb923c;
    --danger: #f87171;

    --bg: #0f0f1a;
    --surface: rgba(255,255,255,0.05);
    --surface-hover: rgba(255,255,255,0.09);
    --glass: rgba(255,255,255,0.06);
    --glass-border: rgba(255,255,255,0.12);

    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    --bot-bubble: rgba(26,86,219,0.15);
    --user-bubble: linear-gradient(135deg, #1a56db, #1139a0);

    --radius: 1rem;
    --radius-sm: 0.5rem;
    --radius-pill: 2rem;
    --transition: 0.2s ease;
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
    --glow: 0 0 20px rgba(99,102,241,0.3);

    --sidebar-w: 260px;
}

[data-theme="light"] {
    --bg: #f0f4ff;
    --surface: rgba(255,255,255,0.7);
    --surface-hover: rgba(255,255,255,0.9);
    --glass: rgba(255,255,255,0.6);
    --glass-border: rgba(99,102,241,0.2);
    --text: #1e1b4b;
    --text-muted: #4b5563;
    --text-dim: #9ca3af;
    --bot-bubble: rgba(26,86,219,0.08);
    --shadow: 0 4px 24px rgba(26,86,219,0.1);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; height: 100%; }
body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    height: 100%;
    overflow: hidden;
    /* CRITICAL: use height:100% not min-height:100vh so inner flex fills correctly on mobile */
}

/* ===== ANIMATED BLOBS ===== */
.bg-blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.18;
    pointer-events: none;
    z-index: 0;
    animation: drift 14s ease-in-out infinite alternate;
}
.blob-1 { width: 500px; height: 500px; background: #1a56db; top: -100px; left: -100px; animation-delay: 0s; }
.blob-2 { width: 400px; height: 400px; background: #ff9933; bottom: -80px; right: -80px; animation-delay: -5s; }
.blob-3 { width: 300px; height: 300px; background: #138808; top: 40%; left: 50%; animation-delay: -9s; }
@keyframes drift {
    from { transform: translate(0, 0) scale(1); }
    to   { transform: translate(30px, 20px) scale(1.08); }
}

/* ===== SHELL LAYOUT ===== */
.app-shell {
    position: relative;
    z-index: 1;
    display: flex;
    height: 100%;
    overflow: hidden;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: var(--glass);
    border-right: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    padding: 1rem;
    gap: 1.25rem;
    overflow-y: auto;
    transition: transform var(--transition);
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo { font-size: 1.05rem; font-weight: 700; color: var(--accent); }

.sidebar-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.sidebar-section {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 0.875rem;
}

select, input[type="number"], input[type="text"] {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    background: var(--surface);
    color: var(--text);
    font-family: inherit;
    font-size: 0.875rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    appearance: none;
    -webkit-appearance: none;
}
select:focus, input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}

#eligibility-form { display: flex; flex-direction: column; gap: 0.6rem; margin-top: 0.25rem; }
.checkbox-row { display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; cursor: pointer; color: var(--text-muted); }
.checkbox-row input { width: auto; }

.pill-btn {
    padding: 0.55rem 1rem;
    border-radius: var(--radius-pill);
    border: none;
    background: var(--primary);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}
.pill-btn:hover { background: var(--primary-dark); transform: translateY(-1px); }
.pill-btn:active { transform: translateY(0); }

#eligibility-result {
    margin-top: 0.5rem;
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    text-align: center;
}
#eligibility-result.eligible { background: rgba(74,222,128,0.15); color: var(--success); border: 1px solid rgba(74,222,128,0.3); }
#eligibility-result.ineligible { background: rgba(248,113,113,0.15); color: var(--danger); border: 1px solid rgba(248,113,113,0.3); }

.quick-topics { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.25rem; }
.topic-chip {
    padding: 0.4rem 0.7rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--glass-border);
    background: var(--surface);
    color: var(--text-muted);
    font-size: 0.78rem;
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
    white-space: nowrap;
}
.topic-chip:hover { background: var(--primary); color: #fff; border-color: transparent; }

.sidebar-footer { margin-top: auto; font-size: 0.72rem; color: var(--text-dim); line-height: 1.5; text-align: center; }

/* ===== MAIN PANEL ===== */
.main-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100%;
}

/* ===== TOP QUICK NAV (mobile-first) ===== */
.top-nav {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 1rem;
    background: var(--glass);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-shrink: 0;
}
.top-nav::-webkit-scrollbar { display: none; }

.nav-chip {
    padding: 0.35rem 0.7rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--glass-border);
    background: var(--surface);
    color: var(--text-muted);
    font-size: 0.72rem;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition);
    flex-shrink: 0;
}
.nav-chip:hover, .nav-chip:focus { background: var(--primary); color: #fff; border-color: transparent; }

/* Language selector in nav */
#lang-select {
    padding: 0.35rem 0.5rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--accent);
    background: rgba(255,153,51,0.1);
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    flex-shrink: 0;
    min-width: 0;
}

/* ===== HEADER ===== */
.app-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--glass);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    flex-shrink: 0;
}
.header-title { flex: 1; min-width: 0; }
.header-title h1 { font-size: 1.1rem; font-weight: 700; color: var(--accent); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.header-actions { display: flex; align-items: center; gap: 0.5rem; flex-shrink: 0; }
.helpline-pill {
    background: rgba(255,153,51,0.15);
    border: 1px solid rgba(255,153,51,0.4);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.3rem 0.7rem;
    border-radius: var(--radius-pill);
    white-space: nowrap;
}
.subtitle { font-size: 0.75rem; color: var(--text-dim); }

.icon-btn {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    width: 36px; height: 36px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    font-size: 1rem;
    transition: background var(--transition), color var(--transition);
    flex-shrink: 0;
}
.icon-btn:hover { background: var(--primary); color: #fff; border-color: transparent; }
#sidebar-close { display: none; }

/* ===== CHAT LOG ===== */
.chat-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 0.75rem 1rem 0.4rem;
    min-height: 0; /* CRITICAL: prevents flex child from overflowing */
}

#chat-log {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-right: 0.25rem;
    scroll-behavior: smooth;
    min-height: 0; /* CRITICAL for mobile scroll */
    -webkit-overflow-scrolling: touch;
}
#chat-log::-webkit-scrollbar { width: 4px; }
#chat-log::-webkit-scrollbar-track { background: transparent; }
#chat-log::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 2px; }

/* ===== MESSAGES ===== */
.msg-row {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
    animation: slideUp 0.25s ease both;
}
.msg-row.user { flex-direction: row-reverse; }

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

.avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--bot-bubble);
    border: 1px solid var(--glass-border);
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.bubble {
    max-width: 75%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    line-height: 1.6;
    word-break: break-word;
}

.bot-bubble {
    background: var(--bot-bubble);
    border: 1px solid var(--glass-border);
    border-bottom-left-radius: 0.25rem;
    backdrop-filter: blur(8px);
    color: var(--text);
}
.bot-bubble p { margin-bottom: 0.4rem; }
.bot-bubble p:last-child { margin-bottom: 0; }
.bot-bubble ul { padding-left: 1.25rem; margin-bottom: 0.4rem; }
.bot-bubble li { margin-bottom: 0.2rem; }
.bot-bubble a { color: var(--primary-light); text-decoration: underline; }
.bot-bubble strong { color: var(--primary-light); }
.bot-bubble code { background: rgba(99,102,241,0.15); padding: 0.1em 0.35em; border-radius: 4px; font-size: 0.85em; }

.user-bubble {
    background: var(--user-bubble);
    border-bottom-right-radius: 0.25rem;
    color: #fff;
    font-weight: 500;
}

/* Source badge */
.msg-meta { margin-top: 0.4rem; }
.source-badge {
    display: inline-block;
    font-size: 0.68rem;
    padding: 0.15rem 0.5rem;
    border-radius: 1rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}
.source-badge.local { background: rgba(19,136,8,0.15); color: #4ade80; border: 1px solid rgba(19,136,8,0.4); }
.source-badge.ai    { background: rgba(26,86,219,0.15); color: var(--primary-light); border: 1px solid rgba(26,86,219,0.3); }

/* ECI Links in sidebar */
.eci-links { display: flex; flex-direction: column; gap: 0.4rem; }
.eci-link {
    display: block;
    padding: 0.45rem 0.75rem;
    border-radius: var(--radius-sm);
    background: var(--surface);
    border: 1px solid var(--glass-border);
    color: var(--primary-light);
    font-size: 0.8rem;
    text-decoration: none;
    transition: background var(--transition), color var(--transition);
}
.eci-link:hover { background: var(--primary); color: #fff; border-color: transparent; }
.helpline-badge {
    margin-top: 0.25rem;
    padding: 0.5rem 0.75rem;
    background: rgba(255,153,51,0.12);
    border: 1px solid rgba(255,153,51,0.3);
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    color: var(--accent);
    text-align: center;
}

/* ===== TYPING INDICATOR ===== */
.typing { padding: 0.75rem 1rem !important; }
.dot {
    display: inline-block;
    width: 7px; height: 7px;
    background: var(--primary-light);
    border-radius: 50%;
    margin: 0 2px;
    animation: bounce 1.2s ease-in-out infinite;
}
.dot:nth-child(2) { animation-delay: 0.2s; }
.dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
    40%            { transform: scale(1); opacity: 1; }
}
.hidden { display: none !important; }

/* ===== FOLLOW-UP CHIPS ===== */
#followups-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0.5rem 0;
    flex-shrink: 0;
}
.followup-chip {
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--glass-border);
    background: var(--surface);
    color: var(--primary-light);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.followup-chip:hover { background: var(--primary); color: #fff; border-color: transparent; transform: translateY(-1px); }

/* ===== INPUT BAR ===== */
.input-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem 0.75rem;
    background: var(--glass);
    border-top: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    flex-shrink: 0; /* CRITICAL: never collapse */
}

.input-bar input {
    flex: 1;
    padding: 0.7rem 1rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--glass-border);
    background: var(--surface);
    color: var(--text);
    font-size: 0.9rem;
    min-width: 0;
}
.input-bar input:focus {
    border-color: var(--primary);
    box-shadow: var(--glow);
}
.input-bar input::placeholder { color: var(--text-dim); }

#send-btn {
    width: 44px; height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--primary);
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
#send-btn:hover { background: var(--primary-dark); transform: scale(1.08); box-shadow: var(--glow); }
#send-btn:active { transform: scale(0.96); }

/* ===== GLOBAL FOCUS FOR KEYPAD/D-PAD ===== */
*:focus-visible {
    outline: 2px solid var(--accent) !important;
    outline-offset: 2px !important;
}

/* ===== RESPONSIVE ===== */

/* Tablet: sidebar as overlay */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0; top: 0; bottom: 0;
        z-index: 100;
        transform: translateX(-100%);
        width: 85vw;
        max-width: 320px;
    }
    .sidebar.open { transform: translateX(0); box-shadow: 0 0 0 1000px rgba(0,0,0,0.5); }
    #sidebar-open { display: flex; }
    #sidebar-close { display: flex; }
    .bubble { max-width: 88%; }
    .chat-wrapper { padding: 0.5rem 0.75rem 0.25rem; }
}
@media (min-width: 769px) {
    #sidebar-open { display: none; }
}

/* Small phone (<480px) */
@media (max-width: 480px) {
    .app-header { padding: 0.6rem 0.75rem; gap: 0.4rem; }
    .header-title h1 { font-size: 0.95rem; }
    .bubble { max-width: 92%; font-size: 0.85rem; }
    .input-bar { padding: 0.5rem 0.75rem 0.6rem; }
    .input-bar input { padding: 0.6rem 0.8rem; font-size: 0.85rem; }
    .avatar { width: 28px; height: 28px; font-size: 0.85rem; }
    .top-nav { padding: 0.35rem 0.75rem; }
}

/* Keypad phone (<360px) */
@media (max-width: 360px) {
    .helpline-pill { display: none; } /* save space — it's in sidebar */
    .bubble { max-width: 95%; font-size: 0.82rem; padding: 0.5rem 0.7rem; }
    #send-btn { width: 40px; height: 40px; }
    .sidebar { width: 100vw; max-width: none; }
    .nav-chip { font-size: 0.65rem; padding: 0.3rem 0.5rem; }
    #lang-select { font-size: 0.65rem; }
}

/* ===== PREFERS REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    *, .bg-blob { animation: none !important; transition: none !important; }
}