/* =====================================================
   RE:BOOT Windows | Design System v3
   Calm, professional hardware-diagnostics aesthetic.
   Accent: circuit teal. Data reads in monospace.
===================================================== */

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

/* ---------- Design Tokens (dark theme — permanent) ---------- */
:root {
    color-scheme: dark;

    --ink: #f5f6f4;
    --ink-soft: #b7bfc7;
    --ink-mute: #7c8590;

    --paper: #0c1110;
    --surface: #151b19;
    --surface-2: #1c2320;
    --border: #29322c;
    --border-hover: #3c4740;

    --accent: #2fc794;
    --accent-dark: #58dcae;
    --accent-soft: rgba(47, 199, 148, 0.16);
    --accent-soft-strong: rgba(47, 199, 148, 0.26);

    --success: #3ecb8a;
    --warning: #e0a83a;
    --danger:  #e56b6b;

    --success-soft: rgba(62, 203, 138, 0.16);
    --warning-soft: rgba(224, 168, 58, 0.16);
    --danger-soft:  rgba(229, 107, 107, 0.16);

    --text: var(--ink);
    --text-light: var(--ink-soft);
    --text-muted: var(--ink-mute);
    --background: var(--paper);
    --surface-hover: var(--surface-2);
    --primary: var(--accent);
    --primary-dark: var(--accent-dark);
    --primary-glow: var(--accent-soft);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.30);
    --shadow-md: 0 14px 32px rgba(0, 0, 0, 0.40);
    --shadow-lg: 0 28px 60px rgba(0, 0, 0, 0.50);

    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-sm: 8px;

    --font-body: 'Inter', sans-serif;
    --font-mono: 'IBM Plex Mono', 'SFMono-Regular', monospace;

    --transition: cubic-bezier(0.4, 0, 0.2, 1) 0.25s;
    --max-width: 1220px;
}

/* ---------- Base Document Layout ---------- */
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--paper);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* All headings explicitly bright so none get swallowed by dark bg */
h1, h2, h3, h4, h5, h6 { color: var(--ink); }

img { display: block; max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
button, input, select { font: inherit; color: inherit; }

.container { width: min(92%, var(--max-width)); margin: auto; }
.hidden { display: none !important; }

.section-title { text-align: center; margin-bottom: 3.5rem; }
.section-title h2 { font-size: 2.35rem; font-weight: 700; margin-bottom: 0.8rem; letter-spacing: -0.02em; color: var(--ink); }
.section-title p { max-width: 620px; margin: auto; color: var(--ink-soft); font-size: 1.02rem; }

/* =====================================================
   BUTTON SYSTEM
===================================================== */
.primary-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
    padding: 1rem 2.1rem; border: 1px solid transparent; border-radius: var(--radius-md);
    background: var(--accent); color: #ffffff !important; cursor: pointer;
    font-weight: 600; font-size: 1rem; transition: var(--transition);
    box-shadow: 0 4px 14px var(--accent-soft);
}
.primary-btn:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 22px var(--accent-soft-strong); }
.primary-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

.btn-outline {
    display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
    padding: .65rem 1.3rem; border: 1px solid var(--border-hover); border-radius: var(--radius-sm);
    background: transparent; color: var(--ink) !important; cursor: pointer;
    font-weight: 600; font-size: .88rem; transition: var(--transition);
    -webkit-appearance: none; appearance: none;
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent) !important; background: var(--accent-soft); }

.btn-text { background: none; border: none; color: var(--ink-soft); font-weight: 600; font-size: .88rem; cursor: pointer; padding: .5rem; }
.btn-text:hover { color: var(--ink); }

/* =====================================================
   HEADER & NAVIGATION
===================================================== */
.navbar {
    position: sticky; top: 0; z-index: 999;
    -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
    background: rgba(12, 17, 16, 0.82); border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.nav-wrapper { height: 76px; display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; }
.logo { display: flex; align-items: center; gap: 0.7rem; font-size: 1.3rem; font-weight: 700; letter-spacing: -0.02em; }
.logo img { width: 38px; height: 38px; object-fit: contain; border-radius: 9px; }

nav { display: flex; align-items: center; gap: 2.1rem; margin-left: auto; order: 3; }
nav a { font-weight: 500; font-size: 0.94rem; color: var(--ink-soft); position: relative; padding: 0.5rem 0; }
nav a:hover { color: var(--accent); }
nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--accent); transition: var(--transition); }
nav a:hover::after { width: 100%; }

#saveDevicesBtn { order: 2; }

/* =====================================================
   HERO
===================================================== */
.hero { padding: 6.5rem 0; position: relative; overflow: hidden; }
.hero-content { display: grid; grid-template-columns: 1.15fr 0.85fr; align-items: center; gap: 4rem; }

.tag {
    display: inline-flex; align-items: center; padding: 0.5rem 1.1rem;
    background: var(--accent-soft); color: var(--accent-dark); border-radius: 999px;
    font-size: 0.8rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
    margin-bottom: 1.5rem; border: 1px solid var(--accent-soft-strong);
}

.hero h1 { font-size: 3.6rem; line-height: 1.12; letter-spacing: -0.03em; font-weight: 700; margin-bottom: 1.4rem; color: var(--ink); }
.hero p { font-size: 1.1rem; color: var(--ink-soft); max-width: 520px; margin-bottom: 2.3rem; }

.hero-image { display: flex; justify-content: center; position: relative; }
.hero-image::before {
    content: ''; position: absolute; width: 280px; height: 280px;
    background: var(--accent-soft); filter: blur(70px); z-index: -1; border-radius: 50%;
}
.hero-image img { width: 100%; max-width: 400px; filter: drop-shadow(0 16px 32px rgba(20,24,28,0.08)); animation: floatAnimation 7s ease-in-out infinite; }

@keyframes floatAnimation { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* =====================================================
   ANALYZER PANELS
===================================================== */
.analyzer { padding: 5rem 0; }

.card {
    background: var(--surface); border-radius: var(--radius-lg); padding: 2.5rem;
    box-shadow: var(--shadow-sm); border: 1px solid var(--border); margin-bottom: 2.5rem;
    transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); border-color: var(--border-hover); }
.card h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 1.8rem; letter-spacing: -0.01em; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.75rem; }
.field { display: flex; flex-direction: column; }
.field label { margin-bottom: 0.6rem; font-weight: 600; font-size: 0.88rem; color: var(--ink); }
.field input, .field select {
    height: 52px; border: 1px solid var(--border); border-radius: var(--radius-md);
    padding: 0 1.1rem; background: var(--surface); color: var(--ink); transition: var(--transition);
}
.field input::placeholder { color: var(--ink-mute); }
.field input:focus, .field select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.field input[readonly][data-apk-locked] { background: var(--accent-soft) !important; border-color: var(--accent) !important; color: var(--accent-dark) !important; }

.apk-badge {
    display: inline-block; margin-top: 4px; font-size: .75rem; font-weight: 600;
    font-family: var(--font-mono); color: var(--accent-dark); background: var(--accent-soft);
    padding: 2px 8px; border-radius: 999px; width: fit-content;
}

/* ---------- Component Health Matrix ---------- */
.component-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }

.component-card {
    background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius-md);
    padding: 1.4rem; display: flex; flex-direction: column; justify-content: space-between;
    gap: 1rem; transition: var(--transition); position: relative;
}
.component-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-sm); }
.component-card h4 { font-size: 1rem; font-weight: 600; color: var(--ink); display: flex; align-items: center; gap: .5rem; }
.component-card h4::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--success); transition: var(--transition); }

.component-card select {
    width: 100%; height: 46px; border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 0 1rem; background: var(--background); color: var(--ink); transition: var(--transition);
}
.component-card select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.component-card[data-state="Good"] { border-color: var(--success); background: var(--success-soft); }
.component-card[data-state="Good"] h4::before { background: var(--success); }
.component-card[data-state="Minor Issue"] { border-color: var(--warning); background: var(--warning-soft); }
.component-card[data-state="Minor Issue"] h4::before { background: var(--warning); }
.component-card[data-state="Dead"] { border-color: var(--danger); background: var(--danger-soft); }
.component-card[data-state="Dead"] h4::before { background: var(--danger); }

.analyze-wrapper { display: flex; justify-content: center; margin-top: 3rem; }
.analyze-wrapper .primary-btn { min-width: 280px; height: 58px; font-size: 1.02rem; }

/* =====================================================
   ANALYSIS REPORT — SCORE RINGS
===================================================== */
.report-section { margin-top: 4rem; scroll-margin-top: 100px; }
.report-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; margin-bottom: 2rem; }

.report-card {
    background: var(--background); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 2.3rem; text-align: center; display: flex; flex-direction: column; align-items: center;
}
.report-card h4 { margin-bottom: 1.4rem; font-size: 1.1rem; font-weight: 600; }

.score-ring, .score-circle {
    --pct: 0; --ring-color: var(--accent);
    width: 138px; height: 138px; margin-bottom: 1.4rem; border-radius: 50%; position: relative;
    display: flex; justify-content: center; align-items: center;
    background: conic-gradient(var(--ring-color) calc(var(--pct) * 1%), var(--surface-2) 0);
    transition: background 0.7s cubic-bezier(.4,0,.2,1);
}
.score-ring::before, .score-circle::before {
    content: ''; position: absolute; inset: 9px; border-radius: 50%;
    background: var(--surface); box-shadow: inset 0 1px 4px rgba(20,24,28,.06);
}
.score-ring span, .score-circle span { position: relative; z-index: 1; font-family: var(--font-mono); font-weight: 700; font-size: 2rem; color: var(--ink); }

.score-ring[data-level="high"], .score-circle[data-level="high"] { --ring-color: var(--success); }
.score-ring[data-level="mid"],  .score-circle[data-level="mid"]  { --ring-color: var(--warning); }
.score-ring[data-level="low"],  .score-circle[data-level="low"]  { --ring-color: var(--danger); }

.report-card p { color: var(--ink-soft); font-size: 0.92rem; max-width: 280px; }

.decision-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; margin: 2.5rem 0; }
.decision-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 1.4rem; transition: var(--transition); }
.decision-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--border-hover); }
.decision-card h5 { font-size: 0.8rem; color: var(--ink-soft); margin-bottom: 0.7rem; text-transform: uppercase; letter-spacing: 0.04em; font-weight: 600; }
.decision-card p { font-size: 1.3rem; font-weight: 700; font-family: var(--font-mono); color: var(--ink); word-break: break-word; }

.summary-box { margin-top: 2.5rem; border-radius: var(--radius-lg); padding: 2.3rem; background: var(--accent-soft); border: 1px solid var(--accent-soft-strong); }
.summary-box h4 { margin-bottom: 0.7rem; font-size: 1.2rem; font-weight: 700; color: var(--ink); }
.summary-box p { color: var(--ink); font-size: 1rem; line-height: 1.7; }

#confidenceBadge { font-family: var(--font-mono); }

/* =====================================================
   EXPERT PANEL
===================================================== */
.expert-panel { margin-top: 2.5rem; padding-top: 2.5rem; border-top: 1px solid var(--border); }
.expert-panel-title { font-size: 1.1rem; font-weight: 700; margin-bottom: .3rem; color: var(--ink); }
.expert-panel-subtitle { font-size: .88rem; color: var(--ink-soft); margin-bottom: 1.4rem; }
.expert-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }

.expert-card { border: 1px solid var(--border); border-radius: var(--radius-md); padding: 1.1rem 1.3rem; background: var(--surface); transition: var(--transition); }
.expert-card:hover { box-shadow: var(--shadow-sm); border-color: var(--border-hover); }
.expert-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: .6rem; }
.expert-card-name { font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-soft); }
.expert-card-score { font-family: var(--font-mono); font-size: 1.1rem; font-weight: 700; }
.expert-card-grade { font-size: .76rem; font-weight: 600; padding: .22rem .65rem; border-radius: 999px; margin-bottom: .6rem; display: inline-block; }
.expert-card-notes { font-size: .82rem; color: var(--ink-soft); line-height: 1.55; }

.grade-excellent { background: var(--success-soft); color: var(--success); }
.grade-good      { background: var(--accent-soft);  color: var(--accent-dark); }
.grade-fair      { background: var(--warning-soft); color: var(--warning); }
.grade-poor      { background: var(--danger-soft);  color: var(--danger); }
.grade-critical  { background: var(--danger-soft);  color: var(--danger); }

.score-high { color: var(--success); }
.score-mid  { color: var(--warning); }
.score-low  { color: var(--danger); }

/* =====================================================
   NEXT STEP CTA
===================================================== */
.next-step { margin: 2.5rem 0; text-align: center; padding: 2rem; border-radius: var(--radius-lg); background: var(--surface-2); border: 1px dashed var(--border-hover); }
.next-step p { color: var(--ink-soft); margin-bottom: 1.1rem; max-width: 480px; margin-left: auto; margin-right: auto; }

/* =====================================================
   VALUE FEATURES
===================================================== */
.features { padding: 5.5rem 0; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.6rem; }
.feature-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2.1rem; transition: var(--transition); box-shadow: var(--shadow-sm); }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.75rem; letter-spacing: -0.01em; }
.feature-card p { color: var(--ink-soft); font-size: 0.93rem; line-height: 1.6; }

/* =====================================================
   FOOTER
===================================================== */
footer { background: var(--surface); border-top: 1px solid var(--border); padding: 3.5rem 0; }
.footer-content { display: flex; justify-content: space-between; align-items: center; gap: 3rem; }
.footer-content h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 0.5rem; letter-spacing: -0.01em; }
.footer-content p { color: var(--ink-soft); font-size: 0.92rem; }
.footer-content a { color: var(--accent); font-weight: 600; font-size: .9rem; }

/* =====================================================
   AUTH MODAL
===================================================== */
#authModal { display: none; position: fixed; inset: 0; background: rgba(13, 18, 16, 0.55); -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); z-index: 9999; }
.auth-overlay { height: 100%; display: flex; justify-content: center; align-items: center; padding: 1.5rem; }
.auth-box {
    background: var(--surface); padding: 2rem; width: 100%; max-width: 360px; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg); border: 1px solid var(--border); display: flex; flex-direction: column; gap: .9rem;
    animation: contentFadeInUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) both;
}
.auth-box h2 { font-size: 1.3rem; font-weight: 700; color: var(--ink); margin-bottom: .1rem; }
.auth-box p { color: var(--ink-soft); font-size: .9rem; margin-bottom: .4rem; }
.auth-box input { height: 48px; padding: 0 1rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--background); color: var(--ink); transition: var(--transition); }
.auth-box input::placeholder { color: var(--ink-mute); }
.auth-box input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.auth-box button { height: 46px; border: none; border-radius: var(--radius-sm); cursor: pointer; font-weight: 600; font-size: .92rem; transition: var(--transition); }

#signInBtn { background: var(--accent); color: #ffffff; }
#signInBtn:hover { background: var(--accent-dark); }
#signUpBtn { background: var(--surface-2); color: var(--ink); border: 1px solid var(--border) !important; }
#signUpBtn:hover { border-color: var(--border-hover) !important; }
#closeAuthBtn { background: transparent; color: var(--ink-soft); height: 36px; }
#closeAuthBtn:hover { color: var(--ink); }

/* =====================================================
   ANIMATIONS
===================================================== */
@keyframes contentFadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.card, .feature-card, .report-card, .decision-card { animation: contentFadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) both; }

@media (prefers-reduced-motion: reduce) {
    .card, .feature-card, .report-card, .decision-card, .hero-image img { animation: none !important; }
    * { transition-duration: 0.01ms !important; }
}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--background); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-mute); }

/* =====================================================
   RESPONSIVE
===================================================== */
@media (max-width: 1100px) {
    .decision-grid, .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 992px) {
    .hero-content { grid-template-columns: 1fr; text-align: center; gap: 3rem; }
    .hero h1 { font-size: 2.9rem; }
    .hero p { margin: 0 auto 2.3rem; }
    .hero-image { order: -1; }
}
@media (max-width: 768px) {
    .section-title h2 { font-size: 1.95rem; }
    .grid-2, .component-grid, .report-grid { grid-template-columns: 1fr; }
    .footer-content { flex-direction: column; text-align: center; gap: 1.5rem; }
}
@media (max-width: 560px) {
    .nav-wrapper { flex-direction: column; height: auto; padding: 1.25rem 0; gap: 1rem; }
    nav { gap: 1.1rem; order: 3; margin-left: 0; }
    #saveDevicesBtn { order: 2; }
    .hero h1 { font-size: 2.3rem; }
    .card { padding: 1.5rem; }
    .decision-grid { grid-template-columns: 1fr; }
    .score-ring, .score-circle { width: 118px; height: 118px; }
    .score-ring span, .score-circle span { font-size: 1.7rem; }
}