/* =========
   Base setup
   ========= */
*,
*::before,
*::after { box-sizing: border-box; }

:root{
  --bg-gradient: radial-gradient(circle at top, #1e293b 0, #020617 45%, #020617 100%);
  --card-bg: rgba(15,23,42,.9);
  --card-border: rgba(148,163,184,.18);
  --accent:#6366f1;
  --accent-soft: rgba(99,102,241,.15);
  --accent-strong:#4f46e5;
  --text-main:#e5e7eb;
  --text-muted:#9ca3af;
  --danger:#f97373;
  --radius-lg:18px;
  --radius-pill:999px;
  --shadow-soft:0 18px 50px rgba(15,23,42,.7);
  --transition-fast:.16s ease-out;
}

html,body{ margin:0; padding:0; min-height:100%; }
body{
  font-family: system-ui,-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",sans-serif;
  background: var(--bg-gradient);
  color: var(--text-main);
}

/* optional watermark */
.zidigital-watermark{
  position: fixed; top:14px; left:14px; z-index:10;
  font-weight:800; letter-spacing:.06em; font-size:.8rem;
  padding:6px 10px; border-radius:999px;
  background: rgba(15,23,42,.75);
  border:1px solid rgba(148,163,184,.2);
  color:#e5e7eb; box-shadow:0 8px 20px rgba(15,23,42,.6); user-select:none;
}

/* ========= Layout ========= */
.app-container{ max-width:1080px; margin:0 auto; padding:34px 16px 40px; }
.header{ text-align:center; margin-bottom:24px; }
.header h1{ margin:0 0 8px; font-size:clamp(1.9rem,2.4vw,2.4rem); letter-spacing:.03em; font-weight:700; }
.header p{ margin:0; color:var(--text-muted); font-size:.95rem; }
.main-content{ display:flex; flex-direction:column; gap:18px; }

/* ========= Cards ========= */
.card{
  background:var(--card-bg);
  border-radius:var(--radius-lg);
  border:1px solid var(--card-border);
  padding:16px 18px 18px;
  box-shadow:var(--shadow-soft);
  backdrop-filter:blur(16px);
}
.card h2{ margin:0 0 12px; font-size:1rem; font-weight:600; letter-spacing:.03em; text-transform:uppercase; color:var(--text-muted); }

/* ========= Upload ========= */
.upload-area{
  margin-top:6px; border-radius:var(--radius-lg);
  border:1px dashed rgba(148,163,184,.4);
  background:
    radial-gradient(circle at top left, rgba(56,189,248,.06), transparent),
    radial-gradient(circle at bottom right, rgba(129,140,248,.08), transparent),
    rgba(15,23,42,.85);
  min-height:180px; display:flex; align-items:center; justify-content:center;
  position:relative; cursor:pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}
.upload-area:hover{ border-color:var(--accent); box-shadow:0 0 0 1px rgba(129,140,248,.35), 0 18px 40px rgba(15,23,42,.9); transform: translateY(-1px); }
.upload-area.dragover{ border-color:var(--accent-strong); box-shadow:0 0 0 1px rgba(129,140,248,.5), 0 18px 44px rgba(15,23,42,.95); }
.upload-label{ text-align:center; color:var(--text-muted); font-size:.9rem; pointer-events:none; }
.upload-label span:first-child{ font-weight:600; color:var(--text-main); }
.preview-image{ max-width:100%; max-height:260px; border-radius:16px; display:none; object-fit:cover; box-shadow:0 16px 40px rgba(15,23,42,.9); }

/* ========= Options ========= */
.options-section .options{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:10px; }
.gender-button,.option-button{
  border-radius:var(--radius-pill); border:1px solid rgba(148,163,184,.5);
  background:rgba(15,23,42,.9); color:var(--text-main); font-size:.85rem;
  padding:7px 14px; cursor:pointer; display:inline-flex; align-items:center; gap:6px;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
}
.gender-button::before{ content:""; width:6px; height:6px; border-radius:999px; background:rgba(148,163,184,.7); }
.gender-button.selected::before,.gender-button:hover::before{ background:var(--accent); }
.gender-button:hover,.option-button:hover{ border-color:var(--accent); background:rgba(30,64,175,.6); box-shadow:0 12px 24px rgba(15,23,42,.8); transform: translateY(-.5px); }
.gender-button.selected,.option-button.selected{
  background: linear-gradient(135deg,var(--accent),var(--accent-strong));
  color:#f9fafb; border-color:transparent; box-shadow:0 14px 32px rgba(79,70,229,.65);
}
.styles{ margin-top:8px; }
.style-select{
  width:100%; border-radius:999px; border:1px solid rgba(148,163,184,.55);
  background:rgba(15,23,42,.98); color:var(--text-main); padding:8px 14px; font-size:.9rem; outline:none; appearance:none;
  background-image: linear-gradient(45deg,transparent 50%,#9ca3af 50%), linear-gradient(135deg,#9ca3af 50%,transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%;
  background-size: 7px 7px, 7px 7px; background-repeat:no-repeat;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}
.style-select:focus{ border-color:var(--accent); box-shadow:0 0 0 1px rgba(129,140,248,.4); background-color:rgba(15,23,42,.98); }
.hint{ margin-top:8px; font-size:.8rem; color:var(--text-muted); }

/* ========= Generate ========= */
.generate-section{ text-align:center; }
.generate-button{
  border-radius:var(--radius-pill); border:none; padding:11px 32px;
  font-size:.95rem; font-weight:600; letter-spacing:.02em; text-transform:uppercase;
  background: linear-gradient(135deg,#22c55e,#16a34a); color:#ecfdf5; cursor:pointer;
  display:inline-flex; align-items:center; gap:8px;
  box-shadow:0 18px 38px rgba(22,163,74,.6);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}
.generate-button::after{ content:"→"; font-size:1rem; }
.generate-button:hover{ transform: translateY(-1px); filter: brightness(1.05); box-shadow:0 22px 48px rgba(22,163,74,.75); }
.generate-button:active{ transform: translateY(0); box-shadow:0 10px 26px rgba(22,163,74,.7); }

/* ========= Loading + result ========= */
.hidden{ display:none !important; }
.loading{ display:flex; align-items:center; gap:10px; font-size:.9rem; color:var(--text-muted); margin-bottom:12px; }
.spinner{ width:18px; height:18px; border-radius:50%; border:2px solid rgba(148,163,184,.35); border-top-color:var(--accent); animation:spin .65s linear infinite; }
@keyframes spin{ to{ transform: rotate(360deg); } }
.result-image{ max-width:100%; border-radius:16px; display:block; margin-top:4px; box-shadow:0 22px 52px rgba(15,23,42,.95); }
.ai-description{ margin-top:10px; font-size:.88rem; color:var(--text-muted); line-height:1.5; }

/* ========= Footer ========= */
.footer{ margin-top:28px; text-align:center; font-size:.8rem; color:var(--text-muted); }
.footer strong{ color:var(--accent); font-weight:600; }

/* ========= Responsive ========= */
@media (min-width:900px){
  .main-content{ display:grid; grid-template-columns: minmax(0,1.1fr) minmax(0,.9fr); grid-auto-rows:auto; column-gap:20px; }
  .upload-section{ grid-row:1 / span 3; }
  .options-section{ grid-column:2; }
  .generate-section{ grid-column:2; }
  .result-section{ grid-column:1 / span 2; }
}

/* ===== Login (auth) ===== */
.auth-wrapper{ min-height:100vh; display:grid; place-items:center; padding:40px 16px; }
.login-card{
  width:100%; max-width:440px; border-radius:var(--radius-lg); border:1px solid var(--card-border);
  background:
    radial-gradient(1000px 300px at 20% -10%, rgba(99,102,241,.18), transparent),
    radial-gradient(900px 280px at 120% 120%, rgba(34,197,94,.14), transparent),
    rgba(15,23,42,.85);
  box-shadow:var(--shadow-soft); backdrop-filter:blur(14px); padding:28px 24px;
}
.brand-row{ display:flex; align-items:center; gap:12px; margin-bottom:18px; }
.brand-badge{ width:42px; height:42px; border-radius:12px; display:grid; place-items:center; font-weight:800; letter-spacing:.02em; background:linear-gradient(135deg,var(--accent),var(--accent-strong)); color:#fff; box-shadow:0 10px 26px rgba(79,70,229,.45); }
.brand-text h1{ margin:0; font-size:1.15rem; font-weight:700; letter-spacing:.02em; }
.brand-text p{ margin:2px 0 0; color:var(--text-muted); font-size:.9rem; }
.login-fields{ margin-top:10px; display:grid; gap:12px; }
.input-wrap{ position:relative; }
.input-wrap input{
  width:100%; padding:12px 44px 12px 14px; border-radius:12px; border:1px solid rgba(148,163,184,.35);
  background: rgba(2,6,23,.65); color:var(--text-main); outline:none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}
.input-wrap input::placeholder{ color:var(--text-muted); }
.input-wrap input:focus{ border-color:var(--accent); box-shadow:0 0 0 1px rgba(99,102,241,.25), 0 12px 30px rgba(15,23,42,.65); background: rgba(2,6,23,.8); }
.input-icon{ position:absolute; right:12px; top:50%; transform: translateY(-50%); width:20px; height:20px; fill:#94a3b8; pointer-events:none; }
.btn-primary{
  border:none; border-radius:var(--radius-pill); padding:12px 18px; font-weight:700; letter-spacing:.02em;
  background: linear-gradient(135deg,#22c55e,#16a34a); color:#ecfdf5; cursor:pointer;
  box-shadow:0 16px 36px rgba(22,163,74,.55); transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}
.btn-primary:hover{ transform: translateY(-1px); filter: brightness(1.05); }
.btn-primary:active{ transform: translateY(0); }
.login-msg{ min-height:1.2em; margin:2px 4px 0; font-size:.9rem; color:var(--danger); }
.login-footer{ margin-top:14px; text-align:center; font-size:.85rem; color:var(--text-muted); }
.login-footer strong{ color:var(--text-main); }

/* hide app until logged in */
#appBox.hidden{ display:none !important; }