/* ============================================================
   BarüAI - Ana Stil
   ChatGPT benzeri koyu tema, mobil uyumlu
   ============================================================ */

:root {
    --bg: #0f172a;
    --bg-elev: #1e293b;
    --bg-elev2: #273449;
    --border: #334155;
    --border-light: #475569;
    --text: #e2e8f0;
    --text-dim: #94a3b8;
    --text-muted: #64748b;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-dim: #1e3a5f;
    --accent: #8b5cf6;
    --success: #4ade80;
    --warn: #fbbf24;
    --danger: #f87171;
    --bubble-user: #2563eb;
    --bubble-ai: #1e293b;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --header-h: 56px;
    --sidebar-w: 280px;
}

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

html, body {
    height: 100%;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------------- Buttons ---------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all .15s ease;
    font-family: inherit;
    text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-elev); }
.btn-danger { background: var(--danger); color: #7f1d1d; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-block { width: 100%; }

/* ---------------- Header ---------------- */
.site-header {
    height: var(--header-h);
    background: var(--bg-elev);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    height: 100%;
    padding: 0 16px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--text);
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.site-nav { display: flex; gap: 8px; margin-left: 12px; }
.site-nav a {
    color: var(--text-dim);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 14px;
}
.site-nav a:hover, .site-nav a.active { color: var(--text); background: var(--bg-elev2); }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.user-chip { color: var(--text-dim); font-size: 13px; }

/* ---------------- Chat Layout ---------------- */
.chat-shell {
    display: flex;
    height: calc(100vh - var(--header-h));
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: var(--bg-elev);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}
.sidebar-top { padding: 12px; border-bottom: 1px solid var(--border); }
.sidebar-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}
.conv-item {
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-dim);
    font-size: 14px;
    margin-bottom: 2px;
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}
.conv-item:hover { background: var(--bg-elev2); color: var(--text); }
.conv-item.active { background: var(--primary-dim); color: #fff; }
.conv-item .conv-title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-item .conv-del {
    opacity: 0;
    background: none; border: none; color: var(--text-muted); cursor: pointer;
    padding: 2px 6px; border-radius: 4px; font-size: 16px;
}
.conv-item:hover .conv-del { opacity: 1; }
.conv-item .conv-del:hover { color: var(--danger); }
.sidebar-bottom { padding: 12px; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-muted); }

/* Main chat area */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--bg);
}
.chat-topbar {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-elev);
}
.model-select {
    background: var(--bg-elev2);
    color: var(--text);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
}
.menu-toggle { display: none; background: none; border: none; color: var(--text); font-size: 22px; cursor: pointer; padding: 4px; }
.usage-pill {
    margin-left: auto;
    font-size: 12px;
    color: var(--text-dim);
    background: var(--bg-elev2);
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid var(--border);
}
.usage-pill .bar { display: inline-block; width: 60px; height: 6px; background: var(--border); border-radius: 3px; vertical-align: middle; margin-left: 6px; overflow: hidden; }
.usage-pill .bar > span { display: block; height: 100%; background: linear-gradient(90deg, var(--success), var(--warn)); transition: width .3s; }

/* Messages */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 16px 8px;
    scroll-behavior: smooth;
}
.chat-messages-inner {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.welcome {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-dim);
}
.welcome h1 {
    font-size: 32px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
}
.welcome p { font-size: 16px; margin-bottom: 28px; }
.suggestion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    max-width: 640px;
    margin: 0 auto;
}
.suggestion-card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    text-align: left;
    cursor: pointer;
    color: var(--text);
    transition: all .15s;
}
.suggestion-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.suggestion-card .ico { font-size: 22px; display: block; margin-bottom: 6px; }
.suggestion-card strong { display: block; margin-bottom: 4px; }
.suggestion-card span { color: var(--text-dim); font-size: 13px; }

/* Message bubble */
.msg {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}
.msg-avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; flex-shrink: 0;
}
.msg.user .msg-avatar { background: var(--primary); }
.msg.assistant .msg-avatar { background: linear-gradient(135deg, var(--accent), var(--primary)); }
.msg-body {
    flex: 1;
    min-width: 0;
    background: var(--bubble-ai);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    overflow-wrap: break-word;
    word-break: break-word;
}
.msg.user .msg-body { background: var(--bubble-user); border-color: transparent; color: #fff; }

/* Typing indicator */
.typing { display: inline-flex; gap: 4px; }
.typing span {
    width: 8px; height: 8px; border-radius: 50%; background: var(--text-dim);
    animation: blink 1.4s infinite both;
}
.typing span:nth-child(2) { animation-delay: .2s; }
.typing span:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%,80%,100% { opacity:.2; } 40% { opacity:1; } }

/* Cursor for streaming */
.stream-cursor::after {
    content: '▋';
    animation: blink-cursor 1s steps(2) infinite;
    color: var(--primary);
}
@keyframes blink-cursor { 50% { opacity: 0; } }

/* ---------------- Markdown render ---------------- */
.msg-body h1, .msg-body h2, .msg-body h3 { margin: 12px 0 6px; line-height: 1.3; }
.msg-body h1 { font-size: 1.4em; }
.msg-body h2 { font-size: 1.25em; }
.msg-body h3 { font-size: 1.1em; }
.msg-body p { margin: 8px 0; }
.msg-body ul, .msg-body ol { margin: 8px 0; padding-left: 24px; }
.msg-body li { margin: 4px 0; }
.msg-body code {
    background: rgba(0,0,0,.3);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: .9em;
}
.msg.user .msg-body code { background: rgba(255,255,255,.15); }
.msg-body pre {
    background: #0d1117;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
    overflow-x: auto;
    margin: 10px 0;
}
.msg-body pre code { background: none; padding: 0; font-size: .875em; }
.msg-body blockquote {
    border-left: 3px solid var(--primary);
    padding-left: 12px;
    color: var(--text-dim);
    margin: 8px 0;
}
.msg-body a { color: var(--primary); }
.msg-body table { border-collapse: collapse; width: 100%; margin: 10px 0; }
.msg-body th, .msg-body td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.msg-body th { background: var(--bg-elev2); }

/* Message actions */
.msg-actions {
    margin-top: 8px;
    display: flex;
    gap: 6px;
    opacity: 0;
    transition: opacity .15s;
}
.msg:hover .msg-actions { opacity: 1; }
.msg-actions button {
    background: none; border: none; color: var(--text-muted); cursor: pointer;
    font-size: 12px; padding: 2px 6px; border-radius: 4px;
}
.msg-actions button:hover { color: var(--text); background: var(--bg-elev2); }

/* ---------------- Composer ---------------- */
.chat-composer {
    padding: 12px 16px 16px;
    border-top: 1px solid var(--border);
    background: var(--bg);
}
.composer-inner {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    gap: 8px;
    align-items: flex-end;
}
.composer-inner textarea {
    flex: 1;
    background: var(--bg-elev);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    color: var(--text);
    padding: 12px 14px;
    font-size: 15px;
    font-family: inherit;
    resize: none;
    max-height: 160px;
    min-height: 48px;
    line-height: 1.5;
}
.composer-inner textarea:focus { outline: none; border-color: var(--primary); }
.send-btn {
    width: 48px; height: 48px;
    border-radius: 50%;
    background: var(--primary);
    border: none;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.send-btn:hover { background: var(--primary-hover); }
.send-btn:disabled { background: var(--border-light); cursor: not-allowed; }
.stop-btn { background: var(--danger); }

.composer-hint { text-align: center; font-size: 11px; color: var(--text-muted); margin-top: 8px; }

/* ---------------- Auth Modal ---------------- */
.auth-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.7);
    backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000;
    padding: 20px;
}
.auth-card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}
.auth-card h2 { margin-bottom: 8px; text-align: center; }
.auth-card .sub { color: var(--text-dim); text-align: center; margin-bottom: 24px; font-size: 14px; }
.auth-tabs { display: flex; gap: 4px; background: var(--bg); border-radius: var(--radius-sm); padding: 4px; margin-bottom: 20px; }
.auth-tab {
    flex: 1; padding: 8px; text-align: center; border-radius: 6px; cursor: pointer;
    color: var(--text-dim); font-weight: 600; font-size: 14px; background: none; border: none; font-family: inherit;
}
.auth-tab.active { background: var(--primary); color: #fff; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 600; color: var(--text-dim); }
.form-group input {
    width: 100%; padding: 10px 12px; border-radius: var(--radius-sm);
    border: 1px solid var(--border-light); background: var(--bg); color: var(--text);
    font-size: 14px; font-family: inherit;
}
.form-group input:focus { outline: none; border-color: var(--primary); }
.auth-error {
    background: rgba(248,113,113,.1); border: 1px solid var(--danger); color: var(--danger);
    padding: 10px; border-radius: var(--radius-sm); font-size: 13px; margin-bottom: 16px; display: none;
}
.auth-close {
    position: absolute; top: 16px; right: 16px;
    background: none; border: none; color: var(--text-dim); font-size: 24px; cursor: pointer;
}

/* ---------------- Cookie banner ---------------- */
.cookie-banner {
    position: fixed;
    bottom: 16px; left: 16px; right: 16px;
    max-width: 560px;
    margin: 0 auto;
    background: var(--bg-elev);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 16px 20px;
    box-shadow: var(--shadow);
    z-index: 999;
    animation: slideUp .3s ease;
}
.cookie-banner[hidden] { display: none; }
.cookie-content { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.cookie-content p { flex: 1; min-width: 200px; font-size: 13px; color: var(--text-dim); }
.cookie-actions { display: flex; gap: 8px; }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } }

/* ---------------- Footer ---------------- */
.site-footer {
    background: var(--bg-elev);
    border-top: 1px solid var(--border);
    padding: 40px 16px 20px;
    margin-top: auto;
}
.footer-inner {
    max-width: 1100px; margin: 0 auto;
    display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px;
}
.footer-col h4 { margin-bottom: 12px; font-size: 14px; color: var(--text); }
.footer-col a { display: block; color: var(--text-dim); font-size: 13px; margin-bottom: 6px; }
.footer-col p { color: var(--text-dim); font-size: 13px; }
.footer-bottom { text-align: center; color: var(--text-muted); font-size: 12px; padding-top: 24px; border-top: 1px solid var(--border); }

/* ---------------- Content pages ---------------- */
.page-wrap { max-width: 800px; margin: 0 auto; padding: 40px 20px; flex: 1; }
.page-wrap h1 { margin-bottom: 20px; }
.page-wrap h2 { margin: 24px 0 12px; }
.page-wrap p { margin-bottom: 12px; color: var(--text-dim); }
.page-wrap ul { margin: 12px 0; padding-left: 24px; color: var(--text-dim); }
.page-wrap li { margin-bottom: 6px; }

/* ---------------- Toast ---------------- */
.toast {
    position: fixed; top: 70px; right: 16px;
    background: var(--bg-elev); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 12px 16px;
    color: var(--text); font-size: 14px; z-index: 2000;
    box-shadow: var(--shadow);
    max-width: 360px;
    animation: slideIn .25s ease;
}
.toast.error { border-color: var(--danger); }
.toast.success { border-color: var(--success); }
.toast.warn { border-color: var(--warn); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } }
.toast[hidden] { display: none; }

/* ---------------- Limit banner ---------------- */
.limit-banner {
    background: rgba(251,191,36,.1);
    border: 1px solid var(--warn);
    color: var(--warn);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    text-align: center;
    margin-bottom: 12px;
    display: none;
}
.limit-banner.show { display: block; }

/* ---------------- Mobile ---------------- */
.sidebar-backdrop {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 90;
}
@media (max-width: 860px) {
    .menu-toggle { display: block; }
    .site-nav { display: none; }
    .sidebar {
        position: fixed; top: var(--header-h); bottom: 0; left: 0;
        z-index: 95; transform: translateX(-100%); transition: transform .25s ease;
        width: 85%; max-width: var(--sidebar-w);
    }
    .sidebar.open { transform: translateX(0); }
    .sidebar-backdrop.show { display: block; }
    .chat-messages { padding: 16px 10px 8px; }
    .composer-inner { max-width: 100%; }
    .footer-inner { grid-template-columns: 1fr; gap: 20px; }
    .welcome h1 { font-size: 24px; }
    .auth-card { padding: 24px; }
}

@media (max-width: 480px) {
    .header-actions .user-chip { display: none; }
    .usage-pill .bar { width: 40px; }
    .msg-body { padding: 10px 12px; }
}

/* ============================================================
   Gelişmiş Modern Tasarım & Animasyonlar (merttest özel)
   ============================================================ */

/* Mesajlar için yukarı doğru süzülme animasyonu */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.msg {
    animation: fadeInUp 0.35s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* Scrollbar Tasarımı */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* Glassmorphism Header & Sidebar */
.site-header {
    backdrop-filter: blur(12px);
    background: rgba(30, 41, 59, 0.8) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar {
    background: rgba(15, 23, 42, 0.95) !important;
    backdrop-filter: blur(8px);
}

/* Modern Kartlar & Animasyonları */
.suggestion-card {
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
    border: 1px solid rgba(255, 255, 255, 0.05) !important;
    background: rgba(30, 41, 59, 0.6) !important;
    backdrop-filter: blur(4px);
}
.suggestion-card:hover {
    border-color: var(--primary) !important;
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.15);
    transform: translateY(-4px) scale(1.02) !important;
}

/* Modern Giriş Kartı */
.auth-overlay {
    backdrop-filter: blur(16px) !important;
}
.auth-card {
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    background: rgba(30, 41, 59, 0.9) !important;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5) !important;
    animation: zoomIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

/* Buton & Seçim Kutusu Hover Efektleri */
.btn {
    transition: all 0.2s ease !important;
}
.btn:hover {
    transform: translateY(-2px) scale(1.02) !important;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.25);
}
.btn-primary:hover {
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}
.send-btn {
    transition: all 0.2s ease !important;
}
.send-btn:hover {
    transform: scale(1.08) !important;
}