/* ==========================================
   AI Platform v2 — Ortak Stiller
   ========================================== */
:root {
  --bg: #0a0a0f;
  --surface: #13131a;
  --surface2: #1c1c27;
  --border: #2a2a3a;
  --accent: #7c6fea;
  --accent-h: #9d93f5;
  --accent2: #e96d8a;
  --text: #e8e8f0;
  --text2: #8888aa;
  --text3: #555570;
  --success: #4caf82;
  --error: #e96d6d;
  --warn: #e9a96d;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,.45);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:'Inter',system-ui,sans-serif;min-height:100vh;-webkit-font-smoothing:antialiased}

/* ---- Nav ---- */
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;border-bottom:1px solid var(--border);background:rgba(10,10,15,.92);backdrop-filter:blur(12px);position:sticky;top:0;z-index:100}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:1.05rem;color:var(--text)}
.nav-logo span{background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-right{display:flex;align-items:center;gap:14px}
.credit-chip{display:flex;align-items:center;gap:6px;background:var(--surface2);border:1px solid var(--border);border-radius:20px;padding:5px 12px;font-size:.85rem;color:var(--text2)}
.credit-chip b{color:var(--accent);font-size:.95rem}
.nav-user{font-size:.82rem;color:var(--text2);max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:9px 18px;border-radius:var(--radius-sm);border:none;cursor:pointer;font-size:.88rem;font-weight:600;transition:all .18s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--accent),#6457d4);color:#fff}
.btn-primary:hover{opacity:.9;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text2);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--surface2);color:var(--text)}
.btn-sm{padding:6px 13px;font-size:.82rem}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none!important}

/* ---- Auth Modal ---- */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.72);z-index:200;display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;pointer-events:none;transition:opacity .22s}
.modal-overlay.open{opacity:1;pointer-events:auto}
.modal{background:var(--surface);border:1px solid var(--border);border-radius:16px;width:100%;max-width:420px;padding:32px;box-shadow:var(--shadow)}
.modal h2{font-size:1.3rem;margin-bottom:6px}
.modal p.sub{color:var(--text2);font-size:.88rem;margin-bottom:24px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:.82rem;color:var(--text2);margin-bottom:6px}
.form-group input{width:100%;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);padding:10px 13px;font-size:.92rem;transition:border-color .18s}
.form-group input:focus{outline:none;border-color:var(--accent)}
.modal-tabs{display:flex;gap:0;margin-bottom:24px;border-bottom:1px solid var(--border)}
.modal-tab{flex:1;padding:10px;text-align:center;cursor:pointer;font-size:.88rem;color:var(--text2);border-bottom:2px solid transparent;margin-bottom:-1px;transition:all .18s}
.modal-tab.active{color:var(--accent);border-bottom-color:var(--accent)}
.auth-error{color:var(--error);font-size:.83rem;margin-top:10px;min-height:18px}
.auth-success{color:var(--success);font-size:.83rem;margin-top:10px;min-height:18px}
.link-btn{background:none;border:none;color:var(--accent);cursor:pointer;font-size:.83rem;text-decoration:underline}

/* ---- Ortak kart / container ---- */
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.page-header{padding:40px 0 24px;text-align:center}
.page-header h1{font-size:1.9rem;font-weight:700;margin-bottom:8px}
.page-header p{color:var(--text2);font-size:.95rem}
.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--text2);text-decoration:none;font-size:.85rem;margin:16px 0 0 0;transition:color .18s}
.back-link:hover{color:var(--accent)}

/* ---- Toast ---- */
.toast{position:fixed;bottom:24px;right:24px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 18px;font-size:.88rem;z-index:999;transform:translateY(80px);opacity:0;transition:all .3s;max-width:320px}
.toast.show{transform:translateY(0);opacity:1}
.toast.ok{border-left:3px solid var(--success)}
.toast.err{border-left:3px solid var(--error)}

/* ---- Loading spinner ---- */
.spinner{width:22px;height:22px;border:2.5px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---- Responsive ---- */
@media(max-width:600px){
  .nav{padding:12px 16px}
  .nav-user{display:none}
  .modal{padding:24px 20px}
}