/* OOPS Official Website v0 - Shared Stylesheet */
@font-face {
  font-family: 'OOPS Serif';
  src: url('/fonts/serif-subset.woff2') format('woff2');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --c-bg-dark: #0B0B0C;
  --c-bg-dark-card: #151518;
  --c-border-dark: #26262B;
  --c-text-dark: #FFFFFF;
  --c-text-dark-muted: #9E9EA4;

  --c-bg-cream: #FAF6EF;
  --c-card-cream: #FFFFFF;
  --c-card-cream-alt: #F4EFE6;
  --c-border-cream: #E6DFD3;
  --c-border-cream-dark: #D4CBBC;
  --c-text-cream: #1C1B1A;
  --c-text-cream-muted: #5C5852;
  --c-text-cream-subtle: #878278;

  --c-accent: #E07A3F;
  --c-accent-hover: #CC682F;
  --c-accent-light: #FDF1EA;
  --c-accent-border: #F3B593;

  --c-danger: #D94838;
  --c-danger-bg: #FDEDEB;
  --c-success: #2E8540;
  --c-success-bg: #EAF5ED;
  --c-warning: #B25E00;
  --c-warning-bg: #FEF6E8;

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "OOPS Serif", "Noto Serif SC", "Songti SC", serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.08);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-sans); background-color: var(--c-bg-cream); color: var(--c-text-cream); line-height: 1.65; -webkit-font-smoothing: antialiased; }

/* Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-accent { color: var(--c-accent); }
.text-muted { color: var(--c-text-cream-muted); }
.text-subtle { color: var(--c-text-cream-subtle); }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }

/* DEV Banner */
.dev-banner { display: none; background-color: #FEF3D6; color: #7A3F00; border-bottom: 2px solid var(--c-accent); padding: 8px 16px; font-size: 13px; text-align: center; position: sticky; top: 0; z-index: 1000; }
.dev-banner.active { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; }
.dev-banner strong { font-family: monospace; font-size: 14px; background: rgba(224, 122, 63, 0.15); padding: 2px 6px; border-radius: 4px; color: #B25200; }
.dev-banner button { background: var(--c-accent); color: #fff; border: none; padding: 3px 10px; font-size: 12px; border-radius: 4px; cursor: pointer; }

/* Header & Nav */
.site-header { width: 100%; border-bottom: 1px solid var(--c-border-cream); background-color: rgba(250, 246, 239, 0.95); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 900; }
.site-header.dark { background-color: rgba(11, 11, 12, 0.95); border-bottom: 1px solid var(--c-border-dark); color: var(--c-text-dark); }
.header-inner { max-width: 1120px; margin: 0 auto; padding: 12px 18px; display: flex; align-items: center; justify-content: space-between; }
.brand-link { display: flex; align-items: baseline; gap: 8px; text-decoration: none; color: inherit; }
.brand-logo { font-size: 22px; font-weight: 900; letter-spacing: -0.5px; color: var(--c-accent); }
.brand-sub { font-size: 13px; font-weight: 500; opacity: 0.8; }
.nav-menu { display: flex; align-items: center; gap: 18px; list-style: none; }
.nav-link { text-decoration: none; font-size: 14px; font-weight: 500; color: inherit; opacity: 0.85; transition: opacity 0.15s, color 0.15s; }
.nav-link:hover { opacity: 1; color: var(--c-accent); }
.nav-cta { padding: 7px 15px; background-color: var(--c-accent); color: #fff !important; border-radius: var(--radius-sm); font-size: 13px; font-weight: 600; opacity: 1 !important; text-decoration: none; }
.nav-cta:hover { background-color: var(--c-accent-hover); }
.nav-toggle { display: none; background: none; border: none; font-size: 22px; cursor: pointer; color: inherit; }

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav-menu { display: none; position: absolute; top: 100%; left: 0; right: 0; background: inherit; border-bottom: 1px solid currentColor; flex-direction: column; padding: 16px 20px; gap: 14px; align-items: flex-start; }
  .nav-menu.open { display: flex; }
  .nav-menu .nav-cta { width: 100%; text-align: center; }
}

/* Layout */
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: 680px; margin: 0 auto; padding: 0 16px; }
.section-pad { padding: 56px 0; }
.section-alt { background-color: var(--c-card-cream-alt); border-top: 1px solid var(--c-border-cream); border-bottom: 1px solid var(--c-border-cream); }
@media (max-width: 600px) { .section-pad { padding: 40px 0; } }

/* Typography */
.serif-title { font-family: var(--font-serif); font-weight: 700; letter-spacing: -0.2px; }
.section-header { margin-bottom: 30px; text-align: center; }
.section-tag { display: inline-block; font-size: 13px; font-weight: 700; color: var(--c-accent); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.section-title { font-size: 26px; line-height: 1.35; color: var(--c-text-cream); margin-bottom: 10px; }
@media (min-width: 768px) { .section-title { font-size: 32px; } }
.section-desc { font-size: 15px; color: var(--c-text-cream-muted); max-width: 640px; margin: 0 auto; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-family: var(--font-sans); font-size: 15px; font-weight: 600; padding: 12px 24px; border-radius: var(--radius-sm); border: 1px solid transparent; cursor: pointer; text-decoration: none; min-height: 46px; transition: all 0.18s ease; line-height: 1; }
.btn-primary { background-color: var(--c-accent); color: #FFF; }
.btn-primary:hover:not(:disabled) { background-color: var(--c-accent-hover); }
.btn-secondary-dark { background-color: transparent; border-color: rgba(255, 255, 255, 0.35); color: #FFF; }
.btn-secondary-dark:hover:not(:disabled) { background-color: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.6); }
.btn-secondary-cream { background-color: #FFF; border-color: var(--c-border-cream-dark); color: var(--c-text-cream); }
.btn-secondary-cream:hover:not(:disabled) { background-color: var(--c-card-cream-alt); }
.btn-outline { background-color: transparent; border-color: var(--c-accent); color: var(--c-accent); }
.btn-outline:hover:not(:disabled) { background-color: var(--c-accent-light); }
.btn-sm { padding: 8px 14px; font-size: 13px; min-height: 36px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

/* Cards & Grid */
.card { background-color: var(--c-card-cream); border: 1px solid var(--c-border-cream); border-radius: var(--radius-md); padding: 22px; box-shadow: var(--shadow-sm); }
.card-alt { background-color: var(--c-card-cream-alt); }
.card-dark { background-color: var(--c-bg-dark-card); border: 1px solid var(--c-border-dark); color: var(--c-text-dark); }
.grid-2 { display: grid; grid-template-columns: 1fr; gap: 20px; }
@media (min-width: 768px) { .grid-2 { grid-template-columns: repeat(2, 1fr); } }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 18px; }
@media (min-width: 600px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }
.grid-4 { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 500px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 860px) { .grid-4 { grid-template-columns: repeat(4, 1fr); } }

/* Forms */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; color: var(--c-text-cream); }
.form-group .field-hint { font-size: 12px; color: var(--c-text-cream-subtle); margin-top: 4px; }
.form-control { width: 100%; padding: 12px 14px; font-family: var(--font-sans); font-size: 15px; color: var(--c-text-cream); background-color: #FFF; border: 1.5px solid var(--c-border-cream-dark); border-radius: var(--radius-sm); outline: none; transition: border-color 0.15s, box-shadow 0.15s; }
.form-control:focus { border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(224, 122, 63, 0.15); }
.form-control:disabled { background-color: #F5F2EB; cursor: not-allowed; }
textarea.form-control { min-height: 90px; resize: vertical; }
.form-inline { display: flex; gap: 10px; }
.form-inline .form-control { flex: 1; }
.checkbox-label { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; cursor: pointer; }
.checkbox-label input[type="checkbox"] { margin-top: 4px; width: 16px; height: 16px; accent-color: var(--c-accent); }

/* Alerts */
.alert { padding: 12px 16px; border-radius: var(--radius-sm); font-size: 14px; margin-bottom: 18px; line-height: 1.5; }
.alert-warning { background-color: var(--c-warning-bg); color: #7A3F00; border: 1px solid #F5D399; }
.alert-danger { background-color: var(--c-danger-bg); color: #9E261B; border: 1px solid #F8B4AF; }
.alert-info { background-color: var(--c-accent-light); color: #8D3C10; border: 1px solid var(--c-accent-border); }
.alert-success { background-color: var(--c-success-bg); color: #1B5E28; border: 1px solid #A4DCB2; }

/* Photo Placeholder */
.photo-ph { position: relative; width: 100%; min-height: 180px; border-radius: var(--radius-md); background: linear-gradient(135deg, #ede7dc 0%, #dfd6c6 50%, #cec4b2 100%); border: 1.5px dashed #b5ab99; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 20px 16px; text-align: center; gap: 6px; margin: 16px 0; }
.photo-ph::before { content: "照片占位 TODO"; font-weight: 700; font-size: 13px; color: #4F483D; background: rgba(255,255,255,0.78); padding: 3px 12px; border-radius: 20px; }
.photo-ph::after { content: attr(data-todo); font-size: 13px; color: #6C6354; }

/* Hero */
.hero { background-color: var(--c-bg-dark); color: var(--c-text-dark); padding: 60px 0 76px; }
@media (min-width: 768px) { .hero { padding: 84px 0 100px; } }
.hero-inner { text-align: center; max-width: 860px; margin: 0 auto; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; padding: 5px 14px; border-radius: 20px; background-color: rgba(224, 122, 63, 0.15); border: 1px solid rgba(224, 122, 63, 0.35); color: #FFA570; font-size: 13px; font-weight: 600; margin-bottom: 20px; }
.hero-title { font-family: var(--font-sans); font-size: 32px; font-weight: 900; line-height: 1.2; letter-spacing: -0.5px; color: #FFF; margin-bottom: 16px; }
@media (min-width: 640px) { .hero-title { font-size: 44px; } }
@media (min-width: 992px) { .hero-title { font-size: 54px; } }
.hero-subtitle { font-size: 18px; font-weight: 500; color: #EDECE8; line-height: 1.45; margin-bottom: 12px; }
@media (min-width: 768px) { .hero-subtitle { font-size: 21px; } }
.hero-desc { font-size: 14px; color: var(--c-text-dark-muted); max-width: 660px; margin: 0 auto 28px; line-height: 1.6; }
.hero-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; max-width: 760px; margin: 0 auto; }
@media (min-width: 640px) { .hero-stats-grid { grid-template-columns: repeat(4, 1fr); } }
.hero-stat-card { background: rgba(255, 255, 255, 0.04); border: 1px solid var(--c-border-dark); border-radius: var(--radius-sm); padding: 14px 10px; text-align: center; }
.hero-stat-val { font-size: 19px; font-weight: 800; color: var(--c-accent); margin-bottom: 4px; }
.hero-stat-lbl { font-size: 12px; color: var(--c-text-dark-muted); }

/* Mentors TODO */
.mentor-card { background: #FFF; border: 1.5px dashed var(--c-border-cream-dark); border-radius: var(--radius-md); padding: 20px 16px; text-align: center; transition: transform 0.15s, border-color 0.15s; }
.mentor-card:hover { border-color: var(--c-accent); transform: translateY(-2px); }
.mentor-avatar-ph { width: 56px; height: 56px; border-radius: 50%; background: var(--c-card-cream-alt); border: 1.5px dashed var(--c-text-cream-subtle); display: flex; align-items: center; justify-content: center; margin: 0 auto 10px; font-size: 22px; }
.mentor-name { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.mentor-todo-tag { display: inline-block; font-size: 11px; font-weight: 600; color: var(--c-accent); background: var(--c-accent-light); padding: 2px 8px; border-radius: 12px; margin-bottom: 8px; }
.mentor-desc { font-size: 13px; color: var(--c-text-cream-muted); line-height: 1.45; }

/* Tuition */
.tuition-box { background: #FFF; border: 2px solid var(--c-accent); border-radius: var(--radius-lg); padding: 28px 20px; max-width: 720px; margin: 0 auto; box-shadow: 0 4px 18px rgba(224, 122, 63, 0.1); }
.tuition-price-row { display: flex; align-items: baseline; justify-content: center; gap: 10px; margin: 12px 0; flex-wrap: wrap; }
.tuition-amount { font-size: 38px; font-weight: 900; color: var(--c-accent); }
.tuition-orig { font-size: 16px; color: var(--c-text-cream-subtle); text-decoration: line-through; }
.tuition-kickback { background: var(--c-accent-light); border-radius: var(--radius-md); padding: 14px 18px; margin: 18px 0; text-align: center; color: #78350B; }
.tuition-kickback strong { color: var(--c-accent); font-size: 17px; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item { background-color: var(--c-card-cream); border: 1px solid var(--c-border-cream); border-radius: var(--radius-sm); overflow: hidden; }
.faq-item summary { padding: 15px 18px; font-size: 15px; font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 18px; color: var(--c-accent); }
.faq-item[open] summary::after { content: "−"; }
.faq-content { padding: 0 18px 16px; font-size: 14px; color: var(--c-text-cream-muted); line-height: 1.65; }

/* Stepper */
.stepper-nav { display: flex; align-items: center; justify-content: space-between; position: relative; margin: 24px 0 32px; }
.stepper-nav::before { content: ""; position: absolute; top: 17px; left: 28px; right: 28px; height: 2px; background-color: var(--c-border-cream-dark); z-index: 1; }
.step-node { position: relative; z-index: 2; text-align: center; flex: 1; }
.step-circle { width: 34px; height: 34px; border-radius: 50%; background-color: var(--c-card-cream-alt); border: 2px solid var(--c-border-cream-dark); color: var(--c-text-cream-subtle); display: flex; align-items: center; justify-content: center; margin: 0 auto 6px; font-size: 13px; font-weight: 700; }
.step-label { font-size: 11px; color: var(--c-text-cream-muted); font-weight: 500; }
.step-node.done .step-circle { background-color: var(--c-success); border-color: var(--c-success); color: #FFF; }
.step-node.active .step-circle { background-color: var(--c-accent); border-color: var(--c-accent); color: #FFF; box-shadow: 0 0 0 3px var(--c-accent-light); }
.step-node.active .step-label { color: var(--c-accent); font-weight: 700; }

/* Modals & Toast */
.modal-backdrop { position: fixed; inset: 0; background-color: rgba(0, 0, 0, 0.65); display: none; align-items: center; justify-content: center; padding: 16px; z-index: 1000; }
.modal-backdrop.open { display: flex; }
.modal-box { background: #FFF; border-radius: var(--radius-md); padding: 22px; max-width: 420px; width: 100%; position: relative; box-shadow: var(--shadow-md); }
.modal-close { position: absolute; top: 12px; right: 14px; background: none; border: none; font-size: 22px; color: #888; cursor: pointer; }
.toast-msg { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background-color: #222225; color: #FFF; padding: 10px 18px; border-radius: 30px; font-size: 13px; z-index: 1100; display: none; pointer-events: none; }
.toast-msg.show { display: block; }

/* Footer */
.site-footer { background-color: var(--c-card-cream-alt); border-top: 1px solid var(--c-border-cream); padding: 40px 0 24px; font-size: 13px; color: var(--c-text-cream-muted); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 24px; margin-bottom: 24px; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; gap: 20px; } }
.footer-bottom { border-top: 1px solid var(--c-border-cream); padding-top: 16px; text-align: center; font-size: 12px; color: var(--c-text-cream-subtle); }

/* Quiz & Results */
.quiz-header { background: #FFF; border-bottom: 1px solid var(--c-border-cream); padding: 12px 18px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.quiz-progress-wrap { flex: 1; min-width: 160px; }
.quiz-progress-bar { height: 6px; background-color: var(--c-border-cream); border-radius: 3px; overflow: hidden; margin-top: 5px; }
.quiz-progress-fill { height: 100%; background-color: var(--c-accent); width: 0%; transition: width 0.25s ease; }
.quiz-meta-row { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.quiz-tag { background: var(--c-accent-light); color: var(--c-accent); padding: 2px 7px; border-radius: 4px; font-weight: 600; font-size: 12px; }
.timer-pill { font-family: monospace; font-size: 12px; background: #F0EDE5; padding: 2px 8px; border-radius: 16px; color: var(--c-text-cream); }
.quiz-card { background: #FFF; border: 1px solid var(--c-border-cream); border-radius: var(--radius-md); padding: 22px; margin-top: 20px; }
.quiz-stem { font-size: 17px; font-weight: 600; line-height: 1.5; margin-bottom: 18px; }
.quiz-options { display: flex; flex-direction: column; gap: 10px; }
.quiz-opt-btn { display: flex; align-items: flex-start; gap: 12px; padding: 14px 16px; border: 1.5px solid var(--c-border-cream-dark); border-radius: var(--radius-sm); background: #FFF; cursor: pointer; text-align: left; font-family: var(--font-sans); font-size: 14px; line-height: 1.5; color: var(--c-text-cream); transition: all 0.15s ease; }
.quiz-opt-btn:hover { background: var(--c-card-cream-alt); }
.quiz-opt-btn.selected { border-color: var(--c-accent); background: var(--c-accent-light); color: #692900; font-weight: 500; }
.quiz-opt-key { display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%; background: #EDE7DC; font-weight: 700; font-size: 12px; flex-shrink: 0; }
.quiz-opt-btn.selected .quiz-opt-key { background: var(--c-accent); color: #FFF; }
.quiz-unsure-opt { border-style: dashed; color: var(--c-text-cream-muted); }
.quiz-nav-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 22px; gap: 10px; }
.dim-chart-card { background: #FFF; border: 1px solid var(--c-border-cream); border-radius: var(--radius-md); padding: 18px; margin-bottom: 16px; }
.dim-row { margin-bottom: 14px; }
.dim-row:last-child { margin-bottom: 0; }
.dim-head { display: flex; justify-content: space-between; font-size: 13px; font-weight: 600; margin-bottom: 5px; }
.dim-bar-track { height: 8px; background: var(--c-card-cream-alt); border-radius: 4px; overflow: hidden; }
.dim-bar-fill { height: 100%; background: linear-gradient(90deg, #F3B593 0%, var(--c-accent) 100%); border-radius: 4px; transition: width 0.4s ease; }
.critical-box { background-color: var(--c-danger-bg); border: 2px solid var(--c-danger); border-radius: var(--radius-md); padding: 18px; margin: 20px 0; }
.critical-box h3 { color: #8C1C13; font-size: 15px; margin-bottom: 8px; }
.critical-box ul { padding-left: 18px; color: #721810; font-size: 13px; line-height: 1.6; }
.chip-group { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.chip { background: var(--c-card-cream-alt); border: 1px solid var(--c-border-cream-dark); color: var(--c-text-cream); padding: 4px 10px; border-radius: 14px; font-size: 12px; font-weight: 500; }