:root {
    --bg-page: #ffffff;
    --bg-muted: #fafafa;
    --bg-subtle: #f5f5f7;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-tertiary: #86868b;
    --accent: #16a34a;
    --accent-hover: #15803d;
    --accent-soft: #f0fdf4;
    --accent-border: #bbf7d0;
    --danger: #dc2626;
    --danger-soft: #fef2f2;
    --danger-border: #fecaca;
    --warning: #b45309;
    --warning-soft: #fffbeb;
    --warning-border: #fde68a;
    --border: rgba(0, 0, 0, 0.08);
    --border-light: rgba(0, 0, 0, 0.05);
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --radius-sm: 10px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 999px;
    --font: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
    --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
    --space-xs: 8px;
    --space-sm: 12px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background-color: var(--bg-page);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: -0.011em;
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app {
    padding: var(--space-2xl) 0 var(--space-3xl);
}

.container {
    width: min(92%, 720px);
    margin: 0 auto;
}

/* ── Page header ── */

.page-header {
    margin-bottom: var(--space-2xl);
}

.hero {
    margin-bottom: var(--space-xl);
}

.hero h1 {
    font-size: clamp(1.75rem, 5vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.subtitle {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.5;
    max-width: 420px;
}

.subtitle strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ── UX bar ── */

.ux-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-muted);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
}

.ux-bar-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.ux-bar-item--countdown {
    align-items: flex-end;
    text-align: right;
}

.ux-bar-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--text-tertiary);
}

.ux-bar-value {
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.ux-bar-value--countdown {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.ux-bar-value--overdue {
    color: var(--danger);
}

.ux-bar-value--today {
    color: var(--warning);
}

.ux-bar-value--complete {
    color: var(--accent);
}

.ux-bar-divider {
    width: 1px;
    height: 32px;
    background: var(--border);
    flex-shrink: 0;
}

/* ── Stat cards ── */

.summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.stat-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-page);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xs);
    transition: box-shadow 0.2s var(--ease);
}

.stat-card:hover {
    box-shadow: var(--shadow-sm);
}

.stat-icon {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-sm);
    background: var(--bg-subtle);
    color: var(--text-secondary);
}

.stat-icon svg {
    width: 20px;
    height: 20px;
}

.stat-card--paid .stat-icon {
    background: var(--accent-soft);
    color: var(--accent);
}

.stat-body h3 {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-tertiary);
    margin-bottom: 6px;
}

.stat-body p {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    font-weight: 600;
    letter-spacing: -0.025em;
    line-height: 1.2;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.stat-card--paid .stat-body p {
    color: var(--accent);
}

/* ── Progress panel ── */

.progress-panel {
    padding: var(--space-xl) var(--space-xl) var(--space-lg);
    margin-bottom: var(--space-2xl);
    background: var(--bg-muted);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.progress-eyebrow {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-tertiary);
    margin-bottom: 6px;
}

.progress-header h2 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 4px;
}

.progress-subtitle {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.progress-percentage-wrap {
    text-align: right;
    flex-shrink: 0;
}

.progress-percentage {
    display: block;
    font-size: clamp(2.5rem, 7vw, 3.25rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

.progress-percentage-label {
    display: block;
    margin-top: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-tertiary);
}

.progress-track {
    height: 12px;
    background: var(--bg-subtle);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill,
#progressBar {
    width: 0%;
    height: 100%;
    border-radius: var(--radius-full);
    background: var(--accent);
    transition: width 0.5s var(--ease);
}

.progress-caption,
#progressText {
    margin-top: var(--space-md);
    text-align: center;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ── Section headings ── */

.section-head {
    margin-bottom: var(--space-lg);
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.section-desc {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.installments-section {
    margin-bottom: var(--space-2xl);
}

/* ── Installment cards ── */

.installment-list,
#daftarCicilan {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.cicilan {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-page);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition:
        border-color 0.2s var(--ease),
        box-shadow 0.2s var(--ease);
}

.cicilan:hover {
    border-color: var(--border);
    box-shadow: var(--shadow-xs);
}

.cicilan--paid {
    background: var(--accent-soft);
    border-color: var(--accent-border);
}

.cicilan--next {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
}

.cicilan--overdue {
    background: var(--danger-soft);
    border-color: var(--danger-border);
}

.cicilan--success-flash {
    animation: successFlash 0.8s var(--ease);
}

.cicilan-header {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.info h4 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    border-radius: var(--radius-full);
    border: 1px solid transparent;
}

.status-badge--paid {
    background: var(--accent-soft);
    color: var(--accent-hover);
    border-color: var(--accent-border);
}

.status-badge--pending {
    background: var(--bg-subtle);
    color: var(--text-secondary);
    border-color: var(--border-light);
}

.status-badge--overdue {
    background: var(--danger-soft);
    color: var(--danger);
    border-color: var(--danger-border);
}

.status-badge--next {
    background: var(--bg-page);
    color: var(--accent);
    border-color: var(--accent-border);
}

.cicilan-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 0;
}

.meta-item {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.meta-item--amount {
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.meta-item + .meta-item::before {
    content: "·";
    margin: 0 10px;
    color: var(--text-tertiary);
}

/* ── Buttons ── */

button,
.btn-pay {
    flex-shrink: 0;
    min-width: 96px;
    padding: 10px 20px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    cursor: pointer;
    transition: background 0.15s var(--ease);
}

button:hover,
.btn-pay:hover {
    background: var(--accent-hover);
}

button:active,
.btn-pay:active {
    background: var(--accent-hover);
}

.btn-pay--cancel {
    background: var(--bg-page);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-pay--cancel:hover {
    background: var(--danger-soft);
    color: var(--danger);
    border-color: var(--danger-border);
}

/* ── Gallery ── */

.gallery-section {
    margin-bottom: var(--space-lg);
}

.gallery {
    display: grid;
    gap: var(--space-md);
}

.gallery img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
}

/* ── Animations ── */

@keyframes successFlash {
    0%   { background-color: var(--accent-soft); }
    50%  { background-color: #dcfce7; }
    100% { background-color: var(--accent-soft); }
}

@keyframes modalIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(8px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── Modal ── */

.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: grid;
    place-items: center;
    padding: var(--space-lg);
}

.modal[hidden] {
    display: none;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
}

.modal-card {
    position: relative;
    z-index: 1;
    width: min(100%, 400px);
    padding: var(--space-xl);
    background: var(--bg-page);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    animation: modalIn 0.2s var(--ease);
}

.modal-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
}

.modal-message {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.55;
    margin-bottom: var(--space-lg);
}

.modal-actions {
    display: flex;
    gap: var(--space-sm);
}

.btn-modal {
    flex: 1;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: background 0.15s var(--ease);
}

.btn-modal--cancel {
    background: var(--bg-subtle);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}

.btn-modal--cancel:hover {
    background: var(--bg-muted);
}

.btn-modal--confirm {
    background: var(--accent);
    color: #fff;
}

.btn-modal--confirm:hover {
    background: var(--accent-hover);
}

/* ── Toast ── */

.toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%) translateY(12px);
    z-index: 1100;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 12px 18px;
    background: var(--text-primary);
    color: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-size: 0.875rem;
    font-weight: 500;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s, transform 0.2s var(--ease);
}

.toast--visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    animation: toastIn 0.25s var(--ease);
}

.toast-icon {
    display: grid;
    place-items: center;
    width: 22px;
    height: 22px;
    background: var(--accent);
    border-radius: 50%;
    font-size: 0.6875rem;
    flex-shrink: 0;
}

/* ── Confetti ── */

.confetti-canvas {
    position: fixed;
    inset: 0;
    z-index: 1200;
    pointer-events: none;
}

/* ── Responsive ── */

@media (max-width: 768px) {
    .app {
        padding: var(--space-xl) 0 var(--space-2xl);
    }

    .page-header {
        margin-bottom: var(--space-xl);
    }

    .hero {
        margin-bottom: var(--space-lg);
    }

    .ux-bar {
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-md);
        gap: var(--space-md);
    }

    .ux-bar-divider {
        width: 100%;
        height: 1px;
    }

    .ux-bar-item--countdown {
        align-items: flex-start;
        text-align: left;
    }

    .summary {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
        margin-bottom: var(--space-xl);
    }

    .stat-card {
        flex-direction: row;
        align-items: center;
        padding: var(--space-md) var(--space-lg);
    }

    .progress-panel {
        padding: var(--space-lg);
    }

    .progress-header {
        flex-direction: column;
        align-items: flex-start;
        margin-bottom: var(--space-lg);
    }

    .progress-percentage-wrap {
        text-align: left;
        display: flex;
        align-items: baseline;
        gap: var(--space-sm);
    }

    .progress-percentage-label {
        margin-top: 0;
    }

    .cicilan {
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-md);
    }

    .cicilan-header {
        justify-content: space-between;
    }

    button,
    .btn-pay {
        width: 100%;
        min-width: unset;
    }

    .modal-actions {
        flex-direction: column;
    }

    .toast {
        width: min(92%, 360px);
        justify-content: center;
    }
}

@media (max-width: 420px) {
    .cicilan-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
    }

    .meta-item + .meta-item::before {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .gallery-section{
        margin-top:60px;
    }
    
    .photo-gallery{
        display:grid;
        grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
        gap:20px;
    }
    
    .photo-gallery{
        display:grid;
        grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
        gap:20px;
        margin-top:20px;
    }
    
    .photo-gallery img{
        width:100%;
        max-width:380px;
        height:250px;
        object-fit:cover;
        border-radius:18px;
        box-shadow:0 10px 20px rgba(0,0,0,.12);
        margin:auto;
        display:block;
    }
    }
    
    /* ==========================================
   STYLE PREMIUM UNTUK GALERI FOTO (CSS GRID)
   ========================================== */

/* Kontainer utama bagian galeri */
.gallery-section {
    margin-top: 40px;
    padding: 20px 0;
  }
  
  .gallery-section h2 {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 20px;
    font-weight: 600;
  }
  
  /* Base style untuk wrapper galeri (Menggunakan CSS Grid Responsif) */
  .photo-gallery {
    display: grid;
    grid-template-columns: 1fr; /* Default mobile: 1 kolom penuh */
    gap: 20px; /* Jarak antar kartu foto */
    width: 100%;
  }
  
  /* Pengaturan pembungkus gambar agar efek overflow hidden dan border-radius bekerja sempurna */
  .photo-gallery img {
    width: 100%;
    height: 240px; /* Tinggi seragam sesuai instruksi */
    object-fit: cover; /* Foto otomatis memotong rapi tanpa gepeng */
    border-radius: 12px; /* Border radius modern melengkung halus */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); /* Bayangan halus premium */
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s ease;
    cursor: pointer;
  }
  
  /* Efek Hover Premium: Sedikit zoom dan elevasi bayangan */
  .photo-gallery img:hover {
    transform: scale(1.03) translateY(-4px); /* Efek sedikit zoom dan terangkat ke atas */
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15); /* Bayangan menjadi lebih tegas saat melayang */
  }
  
  /* Media Query untuk Tablet (Lebar layar mulai dari 600px ke atas) */
  @media (min-width: 600px) {
    .photo-gallery {
      grid-template-columns: repeat(2, 1fr); /* Otomatis membagi rapi menjadi 2 kolom */
      gap: 24px;
    }
  }
  
  /* Media Query untuk Desktop Modern (Lebar layar mulai dari 1024px ke atas) */
  @media (min-width: 1024px) {
    .photo-gallery {
      grid-template-columns: repeat(2, 1fr); /* Tetap mempertahankan format 2 kolom premium */
      gap: 30px; /* Jarak antar foto sedikit lebih lebar agar lega di layar besar */
    }
  }

/* Styling Tambahan Modal Input Nominal Custom */
.modal-input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    margin-top: 10px;
    margin-bottom: 20px;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.2s;
  }
  
  .modal-input:focus {
    border-color: #0071e3;
  }    
  /* Styling UX Modern Modal */
#amountModalSubmit:disabled {
    background-color: #a2a2a2 !important;
    opacity: 0.6;
    cursor: not-allowed !important;
  }