/* ============================================================
   Base Styles — AI Resume Generator
   Clean, professional, warm-but-restrained.
   ============================================================ */

:root {
    --color-primary:    #0D7377;
    --color-primary-muted: #E8F4F4;
    --color-ink:        #1C1C1A;
    --color-secondary:  #6B6B66;
    --color-cream:      #F4F1EC;
    --color-bg:         #FAFAF8;
    --color-white:      #FFFFFF;
    --color-border:     #E5E3DE;
    --color-danger:     #C53030;
    --color-success:    #2E7D60;

    --font-cn: "Noto Sans CJK SC", "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", sans-serif;

    --radius-sm:  6px;
    --radius-md:  10px;
    --radius-lg:  14px;

    --shadow-subtle: 0 1px 3px rgba(0,0,0,0.04);
    --shadow-card:   0 2px 10px rgba(0,0,0,0.06);
    --shadow-raised: 0 4px 18px rgba(0,0,0,0.08);

    --transition: 0.25s ease;
}

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

:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
:focus:not(:focus-visible) { outline: none; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font-cn);
    color: var(--color-ink);
    background: var(--color-bg);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Navigation ────────────────────────────────────────── */
.nav-bar {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.nav-logo {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.01em;
    transition: opacity var(--transition);
}
.nav-logo:hover { opacity: 0.7; }

.nav-links { display: flex; gap: 8px; align-items: center; }

.nav-link {
    color: var(--color-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.nav-link:hover { color: var(--color-ink); background: var(--color-bg); }

.nav-github {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: var(--color-ink);
    color: #fff !important;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    transition: opacity var(--transition);
}
.nav-github:hover { opacity: 0.85; background: var(--color-ink) !important; }

/* ── Main ──────────────────────────────────────────────── */
.main-content { flex: 1; width: 100%; }

/* ── Footer ────────────────────────────────────────────── */
.footer {
    background: var(--color-cream);
    padding: 32px 0;
    text-align: center;
    margin-top: auto;
}
.footer-container { max-width: 640px; margin: 0 auto; padding: 0 24px; }
.footer p { color: var(--color-secondary); font-size: 0.82rem; }
.footer-sub { font-size: 0.76rem; opacity: 0.7; margin-top: 4px; }
.footer-repo { margin-top: 8px; font-size: 0.8rem; }
.footer-repo a { color: var(--color-ink); text-decoration: none; font-weight: 600; }
.footer-repo a:hover { text-decoration: underline; }

/* ── Buttons ───────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 22px;
    font-size: 0.92rem;
    font-family: var(--font-cn);
    font-weight: 600;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
    white-space: nowrap;
    user-select: none;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.btn-primary:hover:not(:disabled) {
    background: #0A5E62;
    border-color: #0A5E62;
}

.btn-success {
    background: var(--color-ink);
    color: #fff;
    border-color: var(--color-ink);
}
.btn-success:hover:not(:disabled) { opacity: 0.9; }

.btn-outline {
    background: transparent;
    color: var(--color-ink);
    border-color: var(--color-border);
}
.btn-outline:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-muted);
}

.btn-lg { padding: 15px 36px; font-size: 1.05rem; }

.btn-add {
    margin-top: 12px;
    width: 100%;
    border-style: dashed;
    border-color: var(--color-border);
    color: var(--color-secondary);
    background: transparent;
    border-width: 2px;
}
.btn-add:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ── Forms ─────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; flex: 1; }

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
    font-size: 0.88rem;
    color: var(--color-ink);
}
.required { color: var(--color-danger); }

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.95rem;
    font-family: var(--font-cn);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-white);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(13,115,119,0.1);
}
.form-group input.error,
.form-group textarea.error { border-color: var(--color-danger); }
.form-group input.valid { border-color: var(--color-success); padding-right: 34px; }

.form-error { color: var(--color-danger); font-size: 0.78rem; margin-top: 4px; font-weight: 500; }
.form-hint { color: var(--color-secondary); font-size: 0.78rem; margin-top: 4px; }
.form-row { display: flex; gap: 18px; }
.section-divider { border: none; border-top: 1px solid var(--color-border); margin: 28px 0; }

/* ── Hero ──────────────────────────────────────────────── */
.hero {
    padding: 80px 24px 56px;
    text-align: center;
    background: linear-gradient(180deg, #FFFFFF 0%, #FAFAF8 100%);
}
.hero-content { max-width: 680px; margin: 0 auto; }

.hero-title {
    font-size: 2.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-ink);
    margin-bottom: 18px;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 1.08rem;
    color: var(--color-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.hero-badge {
    display: inline-block;
    background: var(--color-cream);
    padding: 7px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    color: var(--color-secondary);
    margin-bottom: 28px;
}
.hero-badge strong { color: var(--color-ink); font-weight: 700; }

.hero-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 32px;
}

.feature-card {
    background: var(--color-white);
    padding: 22px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition), box-shadow var(--transition);
}
.feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-card);
}
.feature-icon { font-size: 1.6rem; display: block; margin-bottom: 8px; }
.feature-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 4px; color: var(--color-ink); }
.feature-card p { font-size: 0.82rem; color: var(--color-secondary); line-height: 1.6; }

.hero-actions { margin-top: 4px; }
.hero-hint { margin-top: 14px; font-size: 0.85rem; color: var(--color-secondary); }

/* ── How It Works ──────────────────────────────────────── */
.how-it-works {
    padding: 72px 24px;
    max-width: 900px;
    margin: 0 auto;
    background: var(--color-white);
}
.section-title {
    text-align: center;
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 40px;
    color: var(--color-ink);
    letter-spacing: -0.01em;
}
.steps-row {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 16px;
}
.step-item { text-align: center; flex: 1; max-width: 180px; }

.step-number {
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--color-primary-muted);
    color: var(--color-primary);
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
}
.step-item h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; }
.step-item p { font-size: 0.82rem; color: var(--color-secondary); }
.step-arrow {
    font-size: 1.2rem;
    color: var(--color-border);
    margin-top: 14px;
    font-weight: 300;
}

/* ── Template Showcase ─────────────────────────────────── */
.templates-showcase {
    padding: 72px 24px;
    background: var(--color-cream);
}
.template-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}
.template-card {
    text-align: center;
    padding: 24px 18px;
    border-radius: var(--radius-md);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition), box-shadow var(--transition);
}
.template-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-card);
}

.template-preview {
    height: 140px;
    margin-bottom: 14px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Mini resume previews */
.mini-resume { width: 130px; padding: 10px; }
.classic-preview { background: #f3f3f3; }

.classic-mini { display: flex; gap: 7px; height: 115px; }
.mini-sidebar { width: 28px; background: #1C1C1A; border-radius: 3px; flex-shrink: 0; }
.mini-body { flex: 1; display: flex; flex-direction: column; gap: 5px; padding-top: 6px; }

.mini-line { height: 4px; background: #ccc; border-radius: 2px; }
.mini-line.w90 { width: 90%; } .mini-line.w85 { width: 85%; }
.mini-line.w80 { width: 80%; } .mini-line.w75 { width: 75%; }
.mini-line.w70 { width: 70%; } .mini-line.w65 { width: 65%; }
.mini-line.w60 { width: 60%; } .mini-line.w50 { width: 50%; }

.modern-preview { background: #fff; border: 1.5px solid #e0e0e0; }
.modern-mini .mini-bar {
    width: 100%; height: 6px;
    background: var(--color-primary);
    border-radius: 2px;
    margin-bottom: 10px;
}
.modern-mini .mini-card {
    height: 16px; background: #f5f5f5;
    border: 1px solid #e8e8e8; border-radius: 3px; margin-top: 4px;
}

.compact-preview { background: #fff; border: 1px solid #ddd; }
.compact-mini .mini-line { height: 3px; background: #aaa; border-radius: 1px; }

.template-card h4 { font-size: 0.98rem; font-weight: 700; margin-bottom: 4px; }
.template-card p { font-size: 0.83rem; color: var(--color-secondary); }

/* ── Error Page ────────────────────────────────────────── */
.error-container {
    display: flex; align-items: center; justify-content: center;
    min-height: 60vh; padding: 60px 24px;
}
.error-content { text-align: center; max-width: 480px; }
.error-icon { font-size: 3rem; margin-bottom: 16px; color: var(--color-secondary); }
.error-content h1 { font-size: 1.4rem; font-weight: 700; margin-bottom: 16px; }
.error-message {
    color: var(--color-secondary); margin-bottom: 28px;
    padding: 18px; background: var(--color-cream);
    border-radius: var(--radius-sm); border: 1px solid var(--color-border);
}
.error-actions { display: flex; gap: 12px; justify-content: center; margin-bottom: 16px; }
.error-hint { font-size: 0.85rem; color: var(--color-secondary); line-height: 1.8; }

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
    .hero-features { grid-template-columns: repeat(2, 1fr); }
    .template-cards { grid-template-columns: 1fr; }
    .steps-row { flex-direction: column; align-items: center; gap: 20px; }
    .step-arrow { display: none; }
    .form-row { flex-direction: column; gap: 0; }
    .hero-title { font-size: 1.7rem; }
    .hero { padding: 56px 20px 40px; }
    .nav-link { font-size: 0.82rem; }
    .nav-github span { display: none; }
    .loading-content { margin: 0 20px; padding: 28px 20px; }
}

@media (max-width: 480px) {
    .hero-features { grid-template-columns: 1fr; }
    .hero-title { font-size: 1.4rem; }
    .nav-logo { font-size: 0.95rem; }
    .btn-lg { padding: 13px 28px; font-size: 0.95rem; }

    /* ── Mobile nav: compact links, hide GitHub button ── */
    .nav-container { padding: 0 12px; }
    .nav-links { gap: 2px; }
    .nav-link { font-size: 0.78rem; padding: 4px 8px; }
    .nav-github { display: none; }

    /* ── How-it-works: full-width step items ── */
    .step-item { max-width: none; }

    /* ── Loading overlay: smaller padding ── */
    .loading-content { padding: 20px; margin: 0 12px; }

    /* ── btn-sm compact ── */
    .btn-sm { padding: 7px 14px; font-size: 0.82rem; }
}

/* ── Print ─────────────────────────────────────────────── */
@media print {
    body { background: white; font-size: 10pt; }
    .nav-bar, .footer, .preview-toolbar, .wizard-nav, .wizard-progress,
    .loading-overlay, .btn, .template-switcher, .no-print { display: none !important; }
    .resume-page { box-shadow: none !important; border: none !important; margin: 0 !important; padding: 0 !important; }
    @page { size: A4; margin: 15mm; }
}