/* =====================================================================
   CORE.CSS — Token desain & komponen bersama untuk semua template [BRAND]
   =====================================================================
   Jangan taruh style yang KHUSUS satu template di sini (mis. warna kue
   ulang tahun, layar telepon, dsb). File ini isinya cuma yang dipakai
   ULANG oleh 4 template: token warna/tipografi dasar, tombol, footer
   referral, watermark preview mode, story engine (timeline foto), dan
   mode surat. Tiap template boleh override token (--accent, --bg, dst)
   di style.css miliknya sendiri, lalu import file ini duluan.

   Urutan pemakaian di tiap template:
   <link rel="stylesheet" href="../../shared/core.css">
   <link rel="stylesheet" href="./style.css">   <!-- override token -->
   ===================================================================== */

/* ---------------------------------------------------------------------
   1. RESET MINIMAL
   --------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img,
video {
  max-width: 100%;
  display: block;
}

button {
  font: inherit;
  color: inherit;
}

a {
  color: inherit;
}

/* ---------------------------------------------------------------------
   2. TOKEN DESAIN (default — mood "intim, hangat, malam hari")
   Tiap template override sebagian variabel ini di style.css-nya,
   MISALNYA:
     --color-bg: #050914;
     --color-accent: #ffd27a;
   Jangan ganti nama variabelnya, cukup ganti nilainya per template.
   --------------------------------------------------------------------- */
:root {
  /* -- Warna dasar (netral, gelap, hangat) -- */
  --color-bg: #0b0d14;
  --color-bg-elevated: #12141f;
  --color-text: #f3efe8;
  --color-text-muted: #b9b4ac;
  --color-accent: #ffd27a; /* warna hangat khas lilin/senja, override per template */
  --color-accent-contrast: #1a1305;
  --color-wa: #25d366; /* hijau WhatsApp, dipakai khusus tombol balas/referral */
  --color-wa-contrast: #05210f;
  --color-danger: #ff6b6b;

  /* -- Tipografi --
     Sengaja pakai system font stack (tanpa font eksternal) supaya
     Babak 1 tetap ringan & sesuai budget performa 6.6. Kalau suatu
     saat mau nambah 1 font display, override --font-display saja
     dan pastikan pakai font-display: swap. */
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-display: var(--font-body);
  --font-letter: Georgia, "Times New Roman", serif; /* mode surat: berasa nulis tangan/formal hangat */

  --fs-xs: 0.8rem;
  --fs-sm: 0.925rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.5rem;
  --fs-xl: 2rem;
  --fs-2xl: 2.75rem;
  --lh-tight: 1.2;
  --lh-normal: 1.6;
  --lh-loose: 1.85;

  /* -- Spacing scale -- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;

  /* -- Bentuk & bayangan -- */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.35);

  /* -- Durasi animasi (dihormati prefers-reduced-motion di bagian 8) -- */
  --duration-fast: 200ms;
  --duration-base: 500ms;
  --duration-slow: 900ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* -- Lebar konten -- */
  --container-width: 480px; /* mobile-first: konten selalu terasa "satu kolom di HP" */

  /* -- Z-index scale, biar overlay/footer/watermark nggak rebutan -- */
  --z-footer: 40;
  --z-inapp-banner: 45;
  --z-preview-watermark: 50;
  --z-preview-lock: 55;
  --z-preview-expired: 90;
}

/* ---------------------------------------------------------------------
   3. LAYOUT DASAR
   --------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.babak {
  min-height: 100dvh;
  width: 100%;
  padding-block: var(--space-7);
}

/* Babak yang belum aktif disembunyikan lewat JS (core.js) dengan class ini,
   BUKAN dengan display:none langsung di HTML — supaya gampang di-toggle. */
.babak[hidden] {
  display: none !important;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------------------
   4. TOMBOL (dipakai di semua CTA: tiup lilin, angkat telpon, balas WA, dst)
   --------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-pill);
  border: none;
  font-size: var(--fs-md);
  font-weight: 600;
  cursor: pointer;
  min-height: 48px; /* hit-area nyaman jempol, sesuai prinsip mobile-first Bagian 0.5 */
  transition: transform var(--duration-fast) var(--ease-out),
    opacity var(--duration-fast) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(243, 239, 232, 0.35);
}

.btn--wa {
  background: var(--color-wa);
  color: var(--color-wa-contrast);
}

/* Tombol mute musik, fixed pojok layar di semua babak */
.btn-mute {
  position: fixed;
  bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0px));
  right: var(--space-4);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(18, 20, 31, 0.75);
  backdrop-filter: blur(6px);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-md);
  z-index: var(--z-footer);
  cursor: pointer;
}

/* ---------------------------------------------------------------------
   5. FOOTER REFERRAL — wajib tampil di semua babak/halaman (Bagian 4)
   Di-inject otomatis oleh core.js (lihat GiftCore.footer.inject),
   jadi template tidak perlu menulis markup ini manual di HTML.
   --------------------------------------------------------------------- */
.footer-referral {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-footer);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  padding-bottom: calc(var(--space-2) + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(to top, rgba(5, 6, 10, 0.92), rgba(5, 6, 10, 0.55));
  backdrop-filter: blur(8px);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.footer-referral__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.footer-referral__cta {
  flex-shrink: 0;
  padding: var(--space-2) var(--space-4);
  min-height: 36px;
  font-size: var(--fs-xs);
  background: var(--color-wa);
  color: var(--color-wa-contrast);
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
}

/* Beri jarak bawah pada konten paling akhir tiap babak supaya tidak
   ketutup footer fixed di atas. Ditambahkan otomatis oleh core.js. */
.has-footer-spacing {
  padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px));
}

/* ---------------------------------------------------------------------
   6. BANNER IN-APP BROWSER (Bagian 6.7)
   --------------------------------------------------------------------- */
.inapp-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-inapp-banner);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  font-size: var(--fs-xs);
  border-bottom: 1px solid rgba(243, 239, 232, 0.12);
}

.inapp-banner__close {
  background: none;
  border: none;
  font-size: var(--fs-md);
  line-height: 1;
  padding: var(--space-1) var(--space-2);
  cursor: pointer;
  color: var(--color-text-muted);
}

/* ---------------------------------------------------------------------
   7. PREVIEW MODE (Bagian 6.4)
   --------------------------------------------------------------------- */
.preview-watermark {
  position: fixed;
  inset: 0;
  z-index: var(--z-preview-watermark);
  pointer-events: none;
  overflow: hidden;
  display: flex;
  flex-wrap: wrap;
  align-content: space-around;
  justify-content: space-around;
  transform: rotate(-24deg) scale(1.4);
  opacity: 0.16;
}

.preview-watermark span {
  font-size: var(--fs-lg);
  font-weight: 700;
  white-space: nowrap;
  padding: var(--space-4);
  color: var(--color-text);
}

/* Kunci di atas video saat preview: 10 detik pertama saja lalu digembok */
.preview-lock-overlay {
  position: absolute;
  inset: 0;
  z-index: var(--z-preview-lock);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  background: rgba(5, 6, 10, 0.72);
  color: var(--color-text);
  text-align: center;
  padding: var(--space-5);
  border-radius: inherit;
}

.preview-lock-overlay__icon {
  font-size: var(--fs-2xl);
}

/* Layar penuh saat masa preview sudah lewat expires_at */
.preview-expired-screen {
  position: fixed;
  inset: 0;
  z-index: var(--z-preview-expired);
  background: var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--space-5);
  padding: var(--space-6);
}

/* Item Babak 5 yang dikunci saat preview (mis. amplop ke-2 dst) */
.is-preview-locked {
  position: relative;
  opacity: 0.55;
  pointer-events: none;
}

.is-preview-locked::after {
  content: "🔒";
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  font-size: var(--fs-md);
}

/* ---------------------------------------------------------------------
   8. STORY ENGINE — timeline foto (Bagian 6.1)
   --------------------------------------------------------------------- */
.story-timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}

.story-item {
  opacity: 0;
  transform: translateY(24px);
  /* Animasi masuk-viewport sekarang dijalankan GSAP+ScrollTrigger lewat JS
     (lihat GiftCore.storyEngine di core.js), bukan CSS transition — supaya
     satu sistem animasi (nggak dobel/tabrakan). Kelas .is-visible di bawah
     cuma jadi state akhir fallback kalau GSAP gagal dimuat. */
}

.story-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.story-photo-wrap {
  width: 100%;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-bg-elevated); /* placeholder warna dominan, di-set inline oleh core.js */
  box-shadow: var(--shadow-soft);
}

.story-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.story-caption {
  margin-top: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-normal);
}

.story-caption__location {
  display: inline-block;
  margin-bottom: var(--space-1);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* ---------------------------------------------------------------------
   9. MODE SURAT (Bagian 6.2)
   --------------------------------------------------------------------- */
.letter {
  font-family: var(--font-letter);
  font-size: var(--fs-md);
  line-height: var(--lh-loose);
}

.letter-paragraph {
  margin: 0 0 var(--space-5) 0;
  opacity: 0;
  transform: translateY(12px);
  /* Sama seperti .story-item — animasinya di-drive GSAP+ScrollTrigger. */
}

.letter-paragraph.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Kursor berkedip di ujung teks saat mode typewriter sedang mengetik */
.letter-typing-cursor {
  display: inline-block;
  width: 2px;
  margin-left: 2px;
  background: var(--color-text);
  animation: letter-cursor-blink 900ms steps(1) infinite;
}

@keyframes letter-cursor-blink {
  0%,
  49% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0;
  }
}

.letter-skip-btn {
  margin-top: var(--space-2);
  background: none;
  border: none;
  color: var(--color-text-muted);
  text-decoration: underline;
  font-size: var(--fs-xs);
  cursor: pointer;
  padding: var(--space-2) 0;
}

/* ---------------------------------------------------------------------
   10. MENU "PUTAR LAGI DARI AWAL" (kunjungan setelah hari-H, Bagian 4)
   --------------------------------------------------------------------- */
.replay-menu {
  display: flex;
  justify-content: center;
  padding-block: var(--space-5);
}

.replay-menu__btn {
  background: none;
  border: 1px solid rgba(243, 239, 232, 0.25);
  color: var(--color-text-muted);
  border-radius: var(--radius-pill);
  padding: var(--space-2) var(--space-5);
  font-size: var(--fs-xs);
  cursor: pointer;
}

/* ---------------------------------------------------------------------
   10b. LOTTIE DELIGHT MOMENT (lottie-web, dibatasi maks 2 file/template,
   <100KB masing-masing — lihat PRD-addendum-v1.1-upgrade.md Bagian 0)
   --------------------------------------------------------------------- */
.lottie-burst {
  position: absolute;
  width: 96px;
  height: 96px;
  pointer-events: none;
  z-index: 5;
}

/* ---------------------------------------------------------------------
   10c. PRIVACY GATE (shared/gate.js — PRD Addendum v1.1 Bagian 1)
   --------------------------------------------------------------------- */
.gate-screen {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-6);
  text-align: center;
  background: var(--color-bg);
  color: var(--color-text);
}

.gate-intro {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  max-width: 320px;
}

.gate-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  max-width: 320px;
}

.gate-prompt {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin: 0;
}

.gate-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(243, 239, 232, 0.25);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  font-size: var(--fs-md);
  text-align: center;
}

.gate-input:disabled {
  opacity: 0.5;
}

.gate-wrong-msg {
  color: var(--color-danger, #ff6b6b);
  font-size: var(--fs-sm);
}

/* ---------------------------------------------------------------------
   11. AKSESIBILITAS GERAK — WAJIB (QA Checklist Bagian 14)
   Kalau user set "kurangi gerakan" di OS-nya, matikan semua animasi/
   transisi hias. Tetap tampilkan konten (langsung final state), jangan
   ada yang nyangkut di opacity:0.
   --------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .story-item,
  .letter-paragraph {
    opacity: 1;
    transform: none;
  }
}