/* Mainfeed — main stylesheet (v0) */

:root {
  --bg: #0b0b0e;
  --surface: #16161b;
  --surface-2: #1d1d23;
  --border: #2a2a30;
  --text: #fafafa;
  --text-mute: #9a9aa3;
  --text-dim: #6a6a73;
  --accent: #ff3131;
  --accent-2: #ff914d;
  --accent-grad: linear-gradient(135deg, var(--accent), var(--accent-2));
  --radius: 16px;
  --radius-sm: 10px;
  --radius-btn: 14px;
  --radius-pill: 999px;
  --container: 460px;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "SF Pro Text", "Inter", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
}

a { color: inherit; text-decoration: none; }
button { background: none; border: 0; color: inherit; font: inherit; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }
img, svg { display: block; max-width: 100%; }

/* ============ LAYOUT ============ */

.mf-landing, .mf-auth, .mf-app {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  padding-bottom: max(24px, env(safe-area-inset-bottom));
}

/* Home page: full-bleed video hero. Body inherits min-height:100dvh from base so PTR works. */
.mf-home {
  background: var(--bg);
}

/* ============ VIDEO HERO ============ */

.mf-vhero {
  position: relative;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: clip;
  isolation: isolate;
  background: var(--bg);
}

.mf-vhero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
  pointer-events: none;
}

.mf-vhero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(11, 11, 14, 0.55) 0%,
    rgba(11, 11, 14, 0.25) 28%,
    rgba(11, 11, 14, 0.55) 68%,
    rgba(11, 11, 14, 0.95) 100%
  );
  z-index: -1;
  pointer-events: none;
}

.mf-vhero-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  padding-top: max(20px, env(safe-area-inset-top));
}

.mf-vhero-nav .mf-logo {
  font-size: 20px;
}

/* Brand logo lockup (icon + wordmark) */
.mf-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.mf-brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  display: block;
  flex-shrink: 0;
}

.mf-brand-mark {
  height: 20px;
  width: 92px;
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

/* Menu hamburger button — rounded-square, orange gradient */
.mf-menu-btn {
  width: 44px;
  height: 44px;
  min-width: 44px;
  flex-shrink: 0;
  background: var(--accent-grad);
  border: none;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(255, 49, 49, 0.32);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 0;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.mf-menu-btn:active {
  transform: scale(0.94);
  box-shadow: 0 3px 12px rgba(255, 49, 49, 0.25);
}

.mf-menu-btn span {
  display: block;
  width: 18px;
  height: 2px;
  background: white;
  border-radius: 1px;
}

/* Menu drawer (full-screen overlay) */
.mf-menu {
  position: fixed;
  inset: 0;
  background: rgba(11, 11, 14, 0.92);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  z-index: 100;
  display: flex;
  flex-direction: column;
  padding: 20px;
  padding-top: max(20px, env(safe-area-inset-top));
  padding-bottom: max(20px, env(safe-area-inset-bottom));
  animation: mf-menu-in 0.2s ease;
}

.mf-menu[hidden] {
  display: none;
}

@keyframes mf-menu-in {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.mf-menu-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mf-menu-head .mf-logo {
  font-size: 20px;
}

.mf-menu-close {
  width: 44px;
  height: 44px;
  min-width: 44px;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

.mf-menu-close:active {
  transform: scale(0.94);
  background: rgba(255, 255, 255, 0.18);
}

.mf-menu-list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.mf-menu-list li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.mf-menu-list a {
  display: block;
  padding: 20px 0;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: white;
  transition: color 0.15s ease;
}

.mf-menu-list a:active {
  color: var(--accent);
}

.mf-vhero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px 24px;
  text-align: center;
}

.mf-vhero-h {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.04;
  margin-bottom: 16px;
  color: #fff;
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.45);
}

.mf-vhero-p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.92);
  line-height: 1.45;
  text-shadow: 0 1px 20px rgba(0, 0, 0, 0.5);
  max-width: 340px;
}

.mf-vhero-actions {
  padding: 20px;
  padding-bottom: max(20px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mf-vhero-secondary {
  display: block;
  text-align: center;
  padding: 16px 28px;
  background: linear-gradient(135deg, rgba(255, 49, 49, 0.22), rgba(255, 145, 77, 0.16));
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 17px;
  color: white;
  border: 1px solid rgba(255, 145, 77, 0.4);
  box-shadow: 0 4px 18px rgba(255, 49, 49, 0.15);
  transition: transform 0.15s ease, background 0.15s ease;
}

.mf-vhero-secondary:active {
  transform: scale(0.97);
  background: linear-gradient(135deg, rgba(255, 49, 49, 0.32), rgba(255, 145, 77, 0.24));
}

.mf-vhero-legal {
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 8px;
  line-height: 1.4;
}

.mf-vhero-legal a {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: underline;
}


/* ============ NAV ============ */

.mf-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 0;
}

.mf-back {
  width: 36px;
  height: 36px;
  background: transparent;
  border: 0;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  padding: 0;
  flex-shrink: 0;
  transition: transform 0.15s ease, background 0.15s ease;
}

.mf-back:active {
  transform: scale(0.94);
  background: rgba(255, 255, 255, 0.08);
}

.mf-logo {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.mf-link {
  font-size: 14px;
  color: var(--text-mute);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

/* ============ BUTTONS ============ */

.mf-cta {
  display: inline-block;
  background: var(--accent-grad);
  color: white;
  font-weight: 600;
  font-size: 17px;
  padding: 18px 28px;
  border-radius: var(--radius-btn);
  border: none;
  letter-spacing: -0.01em;
  box-shadow: 0 8px 32px rgba(255, 49, 49, 0.28);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  text-align: center;
}

.mf-cta:active {
  transform: scale(0.97);
  box-shadow: 0 4px 16px rgba(255, 49, 49, 0.22);
}

.mf-cta-block {
  display: block;
  width: 100%;
  margin-top: 16px;
}

.mf-cta-sm {
  padding: 12px 20px;
  font-size: 15px;
}

/* ============ LANDING ============ */

.mf-hero {
  padding: 56px 0 64px;
  text-align: center;
}

.mf-hero-title {
  font-size: 44px;
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin-bottom: 20px;
}

.mf-hero-sub {
  font-size: 17px;
  color: var(--text-mute);
  margin-bottom: 36px;
  line-height: 1.5;
}

.mf-hero-foot {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-dim);
}

.mf-how {
  padding: 32px 0;
  display: grid;
  gap: 16px;
}

.mf-how-step {
  background: var(--surface);
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.mf-how-num {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
}

.mf-how-step h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.mf-how-step p {
  font-size: 15px;
  color: var(--text-mute);
}

.mf-philosophy {
  padding: 64px 0 48px;
  text-align: center;
}

.mf-philosophy p {
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 16px;
}

.mf-philosophy p:last-of-type {
  margin-bottom: 32px;
}

.mf-foot {
  display: flex;
  gap: 20px;
  align-items: center;
  padding: 32px 0 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-dim);
}

.mf-foot-copy {
  margin-left: auto;
}

/* ============ AUTH / SIGNUP ============ */

.mf-form-wrap {
  padding: 16px 0 48px;
}

.mf-step h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 8px;
}

.mf-sub {
  color: var(--text-mute);
  font-size: 15px;
  line-height: 1.5;
  margin-bottom: 24px;
}

.mf-field {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0 16px;
  margin-bottom: 12px;
  height: 56px;
  transition: border-color 0.15s ease;
}

.mf-field:focus-within {
  border-color: var(--accent);
}

.mf-field input {
  width: 100%;
  height: 100%;
  background: transparent;
  border: 0;
  outline: 0;
  font-size: 16px;
}

.mf-field input::placeholder {
  color: var(--text-dim);
}

.mf-prefix {
  color: var(--text-mute);
  font-size: 14px;
  margin-right: 4px;
  white-space: nowrap;
}

/* Progress dots */
.mf-progress {
  display: flex;
  gap: 6px;
  margin-bottom: 32px;
}

.mf-progress span {
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
}

.mf-progress[data-step="1"] span:nth-child(-n+1),
.mf-progress[data-step="2"] span:nth-child(-n+2),
.mf-progress[data-step="3"] span:nth-child(-n+3),
.mf-progress[data-step="4"] span:nth-child(-n+4) {
  background: var(--accent-grad);
}

/* Selfie upload grid */
.mf-selfie-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.mf-selfie-slot {
  position: relative;
  aspect-ratio: 1;
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
}

.mf-selfie-slot input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.mf-selfie-slot span {
  font-size: 32px;
  color: var(--text-dim);
  font-weight: 300;
}

.mf-selfie-slot--filled {
  border-style: solid;
  border-color: var(--accent);
}

.mf-selfie-slot--filled span {
  display: none;
}

/* Liveness stage */
.mf-liveness-stage {
  padding: 20px 0;
  text-align: center;
}

/* Checkbox */
.mf-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  font-size: 15px;
  color: var(--text-mute);
  line-height: 1.5;
  cursor: pointer;
}

.mf-check input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 2px;
  position: relative;
  transition: all 0.15s ease;
}

.mf-check input[type="checkbox"]:checked {
  background: var(--accent-grad);
  border-color: transparent;
}

.mf-check input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 7px;
  top: 3px;
  width: 6px;
  height: 11px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.mf-check a {
  color: var(--accent);
  text-decoration: underline;
}

.mf-foot-link {
  margin-top: 24px;
  text-align: center;
  font-size: 14px;
  color: var(--text-mute);
}

.mf-foot-link a {
  color: var(--accent);
  font-weight: 600;
}

/* ============ APP ============ */

.mf-app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
  border-bottom: 1px solid var(--border);
}

.mf-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--text-mute);
}

.mf-app-main {
  padding: 20px 0 60px;
}

.mf-diary {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 24px;
}

.mf-diary-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.mf-diary-input {
  width: 100%;
  background: transparent;
  border: 0;
  outline: 0;
  resize: none;
  font-size: 16px;
  color: var(--text);
  margin-bottom: 12px;
}

.mf-diary-input::placeholder {
  color: var(--text-dim);
}

.mf-diary-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mf-diary-count {
  font-size: 12px;
  color: var(--text-dim);
}

.mf-feed {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mf-feed-empty {
  text-align: center;
  padding: 48px 16px;
  color: var(--text-mute);
}

.mf-feed-empty h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.mf-feed-empty p {
  font-size: 15px;
}

.mf-piece {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.mf-piece-media {
  width: 100%;
  aspect-ratio: 1;
  background: var(--surface-2);
  display: block;
}

.mf-piece-body {
  padding: 14px 16px;
}

.mf-piece-caption {
  font-size: 15px;
  line-height: 1.4;
  margin-bottom: 12px;
}

.mf-piece-actions {
  display: flex;
  gap: 8px;
}

.mf-piece-action {
  flex: 1;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.mf-piece-action:active {
  background: var(--border);
}