/* === CSS Variables & Theme === */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-card: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-light: #dbeafe;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --radius: 10px;
    --radius-sm: 6px;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-card: #1e293b;
        --text-primary: #f1f5f9;
        --text-secondary: #94a3b8;
        --border: #334155;
        --accent: #60a5fa;
        --accent-hover: #3b82f6;
        --accent-light: #1e3a5f;
        --success: #34d399;
        --warning: #fbbf24;
        --danger: #f87171;
        --danger-light: #2d1b1b;
        --shadow: 0 1px 3px rgba(0,0,0,0.3);
        --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    }
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #334155;
    --accent: #60a5fa;
    --accent-hover: #3b82f6;
    --accent-light: #1e3a5f;
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;
    --danger-light: #2d1b1b;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
}

/* === Header === */
.header {
    background: var(--accent);
    color: #fff;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header h1 { font-size: 1.2rem; font-weight: 600; }
.theme-toggle {
    background: rgba(255,255,255,0.2);
    border: none;
    color: #fff;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}
.theme-toggle:hover { background: rgba(255,255,255,0.3); }

/* === Container === */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 16px;
}

/* === Steps indicator === */
.steps {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
}
.step-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    transition: background 0.3s;
}
.step-dot.active { background: var(--accent); }
.step-dot.done { background: var(--success); }

/* === Cards === */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
}
.card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* === Form Elements === */
.form-group {
    margin-bottom: 14px;
}
.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--text-secondary);
}
.form-group label .required {
    color: var(--danger);
}

input, select, textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.2s;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}
textarea { resize: vertical; min-height: 80px; }

/* WhatsApp field group */
.whatsapp-group {
    display: flex;
    gap: 8px;
}
.whatsapp-group select {
    width: 120px;
    flex-shrink: 0;
}
.whatsapp-group input { flex: 1; }
.whatsapp-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    text-decoration: none;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: 0.9; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}
.btn-outline:hover { background: var(--accent-light); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }

/* === Planilla (Order Items) === */
.planilla-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 12px;
    margin-bottom: 10px;
    position: relative;
    border: 1px solid var(--border);
}
.planilla-item .item-number {
    position: absolute;
    top: -8px;
    left: 10px;
    background: var(--accent);
    color: #fff;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}
.planilla-row {
    display: grid;
    gap: 8px;
    grid-template-columns: 1fr 1fr;
}
.planilla-row .full { grid-column: 1 / -1; }
.planilla-item .btn-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 4px;
    line-height: 1;
}

.planilla-item input,
.planilla-item select {
    padding: 8px 10px;
    font-size: 0.9rem;
}
.planilla-item label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
    display: block;
}

/* === Actions bar === */
.actions {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}
.actions .btn { flex: 1; }

/* === Image upload === */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s;
    color: var(--text-secondary);
}
.upload-area:hover { border-color: var(--accent); }
.upload-area.has-image { border-style: solid; border-color: var(--success); }
.upload-area img {
    max-width: 100%;
    max-height: 200px;
    border-radius: var(--radius-sm);
    margin-top: 10px;
}
.upload-area input[type="file"] { display: none; }

/* === Summary === */
.summary-section { margin-bottom: 16px; }
.summary-section h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}
.summary-row:last-child { border-bottom: none; }
.summary-row .label { color: var(--text-secondary); }

.summary-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    margin-bottom: 6px;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}
.badge-accent { background: var(--accent-light); color: var(--accent); }

/* === Status message === */
.status-message {
    text-align: center;
    padding: 40px 20px;
}
.status-message .icon { font-size: 3rem; margin-bottom: 12px; }
.status-message h2 { margin-bottom: 8px; }
.status-message p { color: var(--text-secondary); margin-bottom: 20px; }

/* === Loading === */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--text-secondary);
}
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: 10px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* === Toast === */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    z-index: 1000;
    transition: transform 0.3s;
    box-shadow: var(--shadow-md);
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* === Responsive (tablet+) === */
@media (min-width: 768px) {
    .container { padding: 24px; }
    .header { padding: 16px 32px; }
    .header h1 { font-size: 1.4rem; }
}