/* =========================================================
   Nano Banana AI Image Generator — Frontend Styles
   ========================================================= */

.nbai-wrap {
    --nb-yellow:   #f5c518;
    --nb-dark:     #1a1a2e;
    --nb-accent:   #7c3aed;
    --nb-accent2:  #a855f7;
    --nb-success:  #10b981;
    --nb-danger:   #ef4444;
    --nb-bg:       #fafafa;
    --nb-card:     #ffffff;
    --nb-border:   #e5e7eb;
    --nb-text:     #111827;
    --nb-muted:    #6b7280;
    --nb-radius:   12px;
    --nb-shadow:   0 4px 24px rgba(0,0,0,.08);

    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    max-width: 720px;
    margin: 0 auto;
    padding: 0 16px 40px;
    color: var(--nb-text);
}

/* ---------- Header ---------- */
.nbai-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px 0 20px;
    flex-wrap: wrap;
}
.nbai-icon   { font-size: 32px; line-height: 1; }
.nbai-title  { margin: 0; font-size: 1.6rem; font-weight: 700; color: var(--nb-dark); }
.nbai-badge  {
    margin-left: auto;
    background: var(--nb-yellow);
    color: #000;
    padding: 4px 12px;
    border-radius: 99px;
    font-size: .8rem;
    font-weight: 600;
}
.nbai-pro-badge { background: var(--nb-accent); color: #fff; }

/* ---------- Form ---------- */
.nbai-form {
    background: var(--nb-card);
    border: 1px solid var(--nb-border);
    border-radius: var(--nb-radius);
    padding: 24px;
    box-shadow: var(--nb-shadow);
}

.nbai-input-group label,
.nbai-control-group label {
    display: block;
    font-size: .85rem;
    font-weight: 600;
    color: var(--nb-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: 6px;
}

.nbai-textarea {
    width: 100%;
    box-sizing: border-box;
    border: 1.5px solid var(--nb-border);
    border-radius: 8px;
    padding: 12px 14px;
    font-size: 1rem;
    line-height: 1.5;
    resize: vertical;
    transition: border-color .2s;
    font-family: inherit;
    color: var(--nb-text);
    background: #fff;
}
.nbai-textarea:focus {
    outline: none;
    border-color: var(--nb-accent);
    box-shadow: 0 0 0 3px rgba(124,58,237,.12);
}

.nbai-controls {
    display: flex;
    gap: 16px;
    margin: 16px 0;
    flex-wrap: wrap;
}
.nbai-control-group { flex: 1; min-width: 140px; }

.nbai-select {
    width: 100%;
    border: 1.5px solid var(--nb-border);
    border-radius: 8px;
    padding: 9px 12px;
    font-size: .95rem;
    font-family: inherit;
    background: #fff;
    color: var(--nb-text);
    cursor: pointer;
    transition: border-color .2s;
}
.nbai-select:focus {
    outline: none;
    border-color: var(--nb-accent);
}

/* ---------- Buttons ---------- */
.nbai-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all .2s;
    font-family: inherit;
}
.nbai-btn-primary {
    background: var(--nb-accent);
    color: #fff;
    width: 100%;
    justify-content: center;
    font-size: 1.05rem;
    padding: 13px;
}
.nbai-btn-primary:hover:not(:disabled) { background: var(--nb-accent2); transform: translateY(-1px); }
.nbai-btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.nbai-btn-secondary {
    background: transparent;
    color: var(--nb-accent);
    border: 1.5px solid var(--nb-accent);
}
.nbai-btn-secondary:hover { background: var(--nb-accent); color: #fff; }
.nbai-btn-upgrade {
    background: var(--nb-accent);
    color: #fff;
    font-size: 1.05rem;
    padding: 14px 28px;
    justify-content: center;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    border-radius: 10px;
    min-width: 260px;
}
.nbai-btn-upgrade:hover { background: var(--nb-accent2); color: #fff; text-decoration: none; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(124,58,237,.35); }
.nbai-price { font-size: .82rem; opacity: .85; font-weight: 400; }

/* ---------- Error ---------- */
.nbai-error {
    margin-top: 12px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--nb-danger);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: .9rem;
}

/* ---------- Loading ---------- */
.nbai-loading {
    text-align: center;
    padding: 48px 24px;
    color: var(--nb-muted);
}
.nbai-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--nb-border);
    border-top-color: var(--nb-accent);
    border-radius: 50%;
    animation: nbai-spin 0.8s linear infinite;
    margin: 0 auto 16px;
}
@keyframes nbai-spin { to { transform: rotate(360deg); } }

/* ---------- Results ---------- */
.nbai-results { margin-top: 24px; }
.nbai-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}
.nbai-results-header h3 { margin: 0; font-size: 1.1rem; color: var(--nb-dark); }

.nbai-images-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}
.nbai-image-card {
    border-radius: var(--nb-radius);
    overflow: hidden;
    box-shadow: var(--nb-shadow);
    background: var(--nb-card);
    border: 1px solid var(--nb-border);
    transition: transform .2s;
}
.nbai-image-card:hover { transform: translateY(-3px); box-shadow: 0 8px 32px rgba(0,0,0,.12); }
.nbai-image-card img {
    display: block;
    width: 100%;
    height: auto;
}
.nbai-image-actions {
    display: flex;
    gap: 8px;
    padding: 10px 12px;
    border-top: 1px solid var(--nb-border);
}
.nbai-download-btn {
    flex: 1;
    background: var(--nb-success);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 7px 10px;
    font-size: .85rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    transition: background .2s;
}
.nbai-download-btn:hover { background: #059669; color: #fff; text-decoration: none; }

/* ---------- Paywall ---------- */
.nbai-paywall {
    margin-top: 24px;
    background: linear-gradient(135deg, #fdf4ff 0%, #f5f3ff 100%);
    border: 1.5px solid #d8b4fe;
    border-radius: 16px;
    padding: 40px 24px;
    text-align: center;
}
.nbai-paywall-inner { max-width: 440px; margin: 0 auto; }
.nbai-paywall-icon  { font-size: 48px; margin-bottom: 12px; }
.nbai-paywall h3    { font-size: 1.4rem; margin: 0 0 10px; color: var(--nb-dark); }
.nbai-paywall p     { color: var(--nb-muted); margin: 0 0 20px; font-size: .95rem; }
.nbai-paywall-features {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 28px;
    text-align: left;
}
.nbai-feature { font-size: .95rem; color: var(--nb-text); }

/* ---------- Responsive ---------- */
@media (max-width: 480px) {
    .nbai-controls { flex-direction: column; }
    .nbai-images-grid { grid-template-columns: 1fr; }
    .nbai-header { flex-direction: column; align-items: flex-start; }
    .nbai-badge { margin-left: 0; }
}