/* ============================================
   HANA INS Technical Whitepaper
   World-Class Design System v3.0
   Clean • Premium • Professional
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* === Design Tokens === */
:root {
    --bg-page:      #F3F4F6;
    --bg-white:     #FFFFFF;
    --bg-subtle:    #FAFBFC;
    --bg-card:      #FFFFFF;
    --bg-code:      #F6F8FA;
    --bg-badge:     #F0F1F3;
    --bg-dark:      #111111;
    --bg-dark-2:    #1A1A1A;

    --text-1:       #0F0F0F;
    --text-2:       #3D4551;
    --text-3:       #6B7280;
    --text-4:       #9CA3AF;
    --text-white:   #FFFFFF;

    --accent:       #C6F135;
    --accent-dim:   #9CBF1A;
    --accent-bg:    #F0F9D6;
    --blue:         #2563EB;
    --blue-bg:      #EFF6FF;
    --emerald:      #059669;
    --emerald-bg:   #ECFDF5;
    --amber:        #D97706;
    --amber-bg:     #FFFBEB;
    --red:          #DC2626;
    --red-bg:       #FEF2F2;

    --border:       #E5E7EB;
    --border-l:     #F3F4F6;

    --r-sm:         12px;
    --r-md:         20px;
    --r-lg:         28px;
    --r-xl:         40px;
    --r-pill:       200px;

    --s-soft:       0 1px 2px rgba(0,0,0,0.03), 0 1px 3px rgba(0,0,0,0.04);
    --s-card:       0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.03);
    --s-hover:      0 8px 30px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
    --s-heavy:      0 16px 48px rgba(0,0,0,0.1), 0 4px 16px rgba(0,0,0,0.06);

    --max-w:        1200px;
    --ease:         cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-spring:  cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-page);
    color: var(--text-1);
    font-size: 16px;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; transition: color 0.2s var(--ease); }
img { max-width: 100%; display: block; }

/* === Utility Container === */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 40px; }

/* === Subtle Page Animations === */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%      { opacity: 0.6; transform: scale(1.4); }
}

/* ============================================
   HERO
   ============================================ */
.hero {
    background: var(--bg-white);
    border-radius: 0 0 var(--r-xl) var(--r-xl);
    padding: 100px 0 120px;
    position: relative;
    overflow: hidden;
}

/* Soft gradient blob (top-right) */
.hero::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -80px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(198,241,53,0.18) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* Subtle grid pattern overlay */
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(0,0,0,0.025) 1px, transparent 0);
    background-size: 32px 32px;
    pointer-events: none;
    z-index: 0;
}

.hero .container {
    position: relative;
    z-index: 1;
    animation: fadeUp 0.8s var(--ease) both;
}

/* Hero Badge */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-badge);
    color: var(--text-3);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 8px 22px;
    border-radius: var(--r-pill);
    margin-bottom: 40px;
}

.hero-badge::before {
    content: '';
    width: 7px;
    height: 7px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse-dot 2s ease infinite;
}

/* Hero Title */
.hero h1 {
    font-size: clamp(56px, 7vw, 96px);
    font-weight: 900;
    line-height: 1.0;
    letter-spacing: -0.04em;
    color: var(--text-1);
    margin-bottom: 28px;
}

.hero h1 span {
    color: transparent;
    -webkit-text-stroke: 2.5px var(--text-1);
    position: relative;
}

/* Hero Logo (SVG) */
.hero-logo {
    line-height: 1;
    margin-bottom: 28px;
}
.hero-logo svg {
    display: block;
}

/* Hero Subtitle */
.hero-subtitle {
    font-size: 1.12rem;
    color: var(--text-2);
    max-width: 600px;
    line-height: 1.75;
    margin-bottom: 56px;
    font-weight: 400;
}

/* Hero Stats — Dark Bar */
.hero-stats {
    display: flex;
    background: var(--bg-dark);
    border-radius: var(--r-lg);
    overflow: hidden;
    max-width: 780px;
    box-shadow: var(--s-heavy);
}

.hero-stat {
    flex: 1;
    padding: 32px 24px;
    text-align: center;
    position: relative;
}

.hero-stat:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 25%;
    height: 50%;
    width: 1px;
    background: rgba(255,255,255,0.08);
}

.hero-stat .stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.hero-stat .stat-label {
    font-size: 0.65rem;
    color: rgba(255,255,255,0.45);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-weight: 600;
    margin-top: 8px;
}

/* Meta Bar */
.meta-bar {
    display: flex;
    gap: 36px;
    flex-wrap: wrap;
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.meta-item {
    font-size: 0.72rem;
    color: var(--text-4);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
}
.meta-item strong {
    color: var(--text-1);
    font-weight: 700;
}

/* ============================================
   TABLE OF CONTENTS
   ============================================ */
.toc { padding: 120px 0; }

.toc-header {
    text-align: center;
    margin-bottom: 64px;
}

.toc-header h2 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--text-1);
}

.toc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.toc-card {
    background: var(--bg-card);
    border: 1px solid var(--border-l);
    border-radius: var(--r-md);
    padding: 28px 24px;
    cursor: pointer;
    transition: all 0.35s var(--ease);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 14px;
    position: relative;
    overflow: hidden;
}

.toc-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease);
}

.toc-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--s-hover);
    border-color: transparent;
}

.toc-card:hover::before { transform: scaleX(1); }

.toc-card .toc-num {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-4);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.toc-card .toc-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-1);
    line-height: 1.35;
}

/* ============================================
   SECTION GLOBAL
   ============================================ */
section {
    padding: 96px 0;
    max-width: var(--max-w);
    margin: 0 auto;
    padding-left: 40px;
    padding-right: 40px;
}

section + section {
    border-top: 1px solid var(--border-l);
}

/* Section Tag */
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-dark);
    color: var(--accent);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 6px 18px;
    border-radius: var(--r-pill);
    margin-bottom: 24px;
}

/* Section Title */
.section-title {
    font-size: clamp(32px, 4vw, 52px);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--text-1);
    margin-bottom: 18px;
}

/* Section Description */
.section-desc {
    font-size: 1.05rem;
    color: var(--text-2);
    max-width: 700px;
    line-height: 1.8;
    margin-bottom: 56px;
}

/* Headings */
h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-1);
    margin-top: 64px;
    margin-bottom: 20px;
    letter-spacing: -0.015em;
    position: relative;
    padding-left: 16px;
}

h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 4px;
    background: var(--accent);
    border-radius: 4px;
}

h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 12px;
    margin-top: 24px;
}

p {
    color: var(--text-2);
    margin-bottom: 16px;
    line-height: 1.8;
}

ul, ol {
    padding-left: 24px;
    color: var(--text-2);
    margin-bottom: 16px;
}

li { margin-bottom: 8px; line-height: 1.7; }

code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.84em;
    background: var(--bg-code);
    padding: 2px 8px;
    border-radius: 6px;
    color: var(--text-1);
    font-weight: 500;
}

strong { color: var(--text-1); font-weight: 700; }

/* ============================================
   TABLES
   ============================================ */
.tbl-wrap {
    margin: 28px 0;
    border-radius: var(--r-md);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-white);
    box-shadow: var(--s-soft);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.87rem;
}

thead tr,
tr:first-child:has(th) {
    background: var(--bg-dark);
}

th {
    text-align: left;
    padding: 16px 22px;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.8);
    border-bottom: none;
}

td {
    padding: 14px 22px;
    border-bottom: 1px solid var(--border-l);
    color: var(--text-2);
    vertical-align: top;
    transition: background 0.2s ease;
}

tr:last-child td { border-bottom: none; }
tr:nth-child(even) { background: var(--bg-subtle); }

tr:hover td { background: var(--accent-bg); }

/* Override inline background styles from old design */
tr[style*="background:rgba(6,182,212"]   { background: var(--blue-bg) !important; }
tr[style*="background:rgba(16,185,129"]  { background: var(--emerald-bg) !important; }
tr[style*="background:rgba(245,158,11"]  { background: var(--amber-bg) !important; }
tr[style*="background:rgba(239,68,68"]   { background: var(--red-bg) !important; }

/* ============================================
   CARDS
   ============================================ */
.cards {
    display: grid;
    gap: 16px;
    margin: 28px 0;
}
.cards-2 { grid-template-columns: 1fr 1fr; }
.cards-3 { grid-template-columns: repeat(3, 1fr); }

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 32px;
    transition: all 0.35s var(--ease);
    position: relative;
    overflow: hidden;
}

.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-dim));
    opacity: 0;
    transition: opacity 0.3s var(--ease);
}

.card:hover {
    box-shadow: var(--s-hover);
    border-color: transparent;
    transform: translateY(-4px);
}

.card:hover::after { opacity: 1; }

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--r-sm);
    background: var(--bg-code);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.2rem;
    color: var(--text-1);
    font-weight: 700;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.card-text {
    font-size: 0.9rem;
    color: var(--text-2);
    line-height: 1.7;
}

/* ============================================
   ARCHITECTURE BOX
   ============================================ */
.arch-box {
    background: var(--bg-dark);
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    line-height: 1.8;
    padding: 36px;
    border-radius: var(--r-md);
    overflow-x: auto;
    white-space: pre;
    margin: 28px 0;
    box-shadow: var(--s-heavy);
    position: relative;
}

.arch-box::before {
    content: 'SYSTEM DIAGRAM';
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 0.55rem;
    letter-spacing: 0.15em;
    color: rgba(198,241,53,0.3);
    font-weight: 700;
}

/* ============================================
   MATH BLOCKS
   ============================================ */
.math {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    border-radius: var(--r-sm);
    padding: 28px 32px;
    margin: 24px 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-2);
    overflow-x: auto;
    white-space: pre-wrap;
    line-height: 1.9;
    box-shadow: var(--s-soft);
}

.math strong { color: var(--text-1); }

/* ============================================
   ALERTS
   ============================================ */
.alert {
    border-radius: var(--r-md);
    padding: 20px 28px;
    margin: 24px 0;
    font-size: 0.9rem;
    line-height: 1.7;
    border: 1px solid;
    position: relative;
    padding-left: 48px;
}

.alert::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 24px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.alert-red {
    background: var(--red-bg);
    border-color: #FECACA;
    color: #991B1B;
}
.alert-red::before { background: var(--red); }

.alert-amber {
    background: var(--amber-bg);
    border-color: #FDE68A;
    color: #92400E;
}
.alert-amber::before { background: var(--amber); }

.alert-green {
    background: var(--emerald-bg);
    border-color: #A7F3D0;
    color: #065F46;
}
.alert-green::before { background: var(--emerald); }

/* ============================================
   TWO-COLUMN
   ============================================ */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin: 28px 0;
}

/* ============================================
   LEVEL BLOCKS (Anti-spoofing)
   ============================================ */
.level-block {
    border-radius: var(--r-md);
    padding: 36px;
    margin: 24px 0;
    border: 1px solid var(--border);
    background: var(--bg-card);
    position: relative;
    overflow: hidden;
    box-shadow: var(--s-card);
    transition: all 0.35s var(--ease);
}

.level-block:hover {
    box-shadow: var(--s-hover);
    transform: translateY(-2px);
}

.level-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 5px;
}

.level-block.level-hw::before     { background: var(--blue); }
.level-block.level-algo::before   { background: var(--emerald); }
.level-block.level-fusion::before { background: var(--amber); }

.level-block h4,
.level-block .level-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-1);
}

/* ============================================
   TIMELINE / ROADMAP
   ============================================ */
.tl-item {
    display: flex;
    gap: 28px;
    margin: 20px 0;
    padding: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    transition: all 0.35s var(--ease);
    box-shadow: var(--s-card);
    position: relative;
    overflow: hidden;
}

.tl-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 4px;
    opacity: 0;
    transition: opacity 0.3s var(--ease);
}

.tl-item:hover {
    box-shadow: var(--s-hover);
    transform: translateY(-3px);
    border-color: transparent;
}

.tl-item:hover::before { opacity: 1; }

.tl-item:nth-child(1)::before { background: var(--text-1); }
.tl-item:nth-child(2)::before { background: var(--blue); }
.tl-item:nth-child(3)::before { background: var(--emerald); }
.tl-item:nth-child(4)::before { background: var(--amber); }

.tl-marker {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: var(--r-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.85rem;
    color: var(--text-white);
    letter-spacing: -0.02em;
}

.tl-m1 { background: var(--bg-dark); }
.tl-m2 { background: var(--blue); }
.tl-m3 { background: var(--emerald); }
.tl-m4 { background: var(--amber); }

.tl-body { flex: 1; min-width: 0; }

.tl-period {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-4);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.tl-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 14px;
    letter-spacing: -0.01em;
}

.tl-desc {
    font-size: 0.9rem;
    color: var(--text-2);
    line-height: 1.7;
}
.tl-desc ul { margin-top: 10px; }

/* ============================================
   COLOR UTILITY
   ============================================ */
.c-red   { color: var(--red); font-weight: 600; }
.c-amber { color: var(--amber); font-weight: 600; }
.c-cyan  { color: var(--blue); font-weight: 600; }
.c-green { color: var(--emerald); font-weight: 600; }

/* ============================================
   FOOTER
   ============================================ */
footer {
    text-align: center;
    padding: 96px 40px 80px;
    color: var(--text-4);
    font-size: 0.82rem;
    border-top: 1px solid var(--border-l);
}

footer .footer-brand {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--text-1);
    letter-spacing: -0.03em;
    margin-bottom: 10px;
}

/* ============================================
   SCROLL-REVEAL (JavaScript-driven)
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .toc-grid { grid-template-columns: repeat(3, 1fr); }
    .cards-3  { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    :root { --max-w: 100%; }
    .container { padding: 0 20px; }
    .hero { padding: 60px 0 80px; }
    .hero h1 { font-size: 40px; }
    .hero-stats { flex-direction: column; }
    .hero-stat:not(:last-child)::after { display: none; }
    .hero-stat { border-bottom: 1px solid rgba(255,255,255,0.06); }
    .hero-stat:last-child { border-bottom: none; }
    .toc-grid { grid-template-columns: 1fr; }
    .two-col, .cards-2, .cards-3 { grid-template-columns: 1fr; }
    section { padding: 56px 20px; }
    .tl-item { flex-direction: column; gap: 16px; }
    h3 { margin-top: 40px; }
    table { font-size: 0.78rem; }
    th, td { padding: 10px 14px; }
}

/* ============================================
   PRINT
   ============================================ */
@media print {
    body { background: white; font-size: 11pt; }
    .hero { border-radius: 0; }
    .hero::before, .hero::after { display: none; }
    .hero-stats { background: #eee; box-shadow: none; }
    .hero-stat .stat-value { color: #111; }
    .hero-stat .stat-label { color: #666; }
    .section-tag { background: #333; color: white; }
    .arch-box { background: #f5f5f5; color: #333; box-shadow: none; }
    .arch-box::before { display: none; }
    .toc-card:hover, .card:hover, .tl-item:hover, .level-block:hover {
        transform: none;
        box-shadow: none;
    }
    section { page-break-inside: avoid; }
    .reveal { opacity: 1; transform: none; }
    #login-gate { display: none !important; }
}

/* ============================================
   LOGIN GATE
   ============================================ */
#login-gate {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s var(--ease), visibility 0.6s;
}

#login-gate.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.login-bg {
    position: absolute;
    inset: 0;
    background: var(--bg-dark);
    background-image:
        radial-gradient(circle at 25% 35%, rgba(198,241,53,0.06) 0%, transparent 50%),
        radial-gradient(circle at 75% 65%, rgba(37,99,235,0.04) 0%, transparent 50%),
        radial-gradient(circle at 1px 1px, rgba(255,255,255,0.02) 1px, transparent 0);
    background-size: 100%, 100%, 24px 24px;
}

.login-card {
    position: relative;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(24px);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--r-lg);
    padding: 56px 48px 48px;
    width: 100%;
    max-width: 420px;
    text-align: center;
    box-shadow:
        0 32px 80px rgba(0,0,0,0.3),
        0 8px 24px rgba(0,0,0,0.15),
        inset 0 1px 0 rgba(255,255,255,0.8);
    animation: fadeUp 0.6s var(--ease) both;
}

.login-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-dark);
    color: var(--accent);
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 5px 16px;
    border-radius: var(--r-pill);
    margin-bottom: 32px;
}

.login-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse-dot 2s ease infinite;
}

.login-title {
    font-size: 48px;
    font-weight: 900;
    letter-spacing: -0.04em;
    color: var(--text-1);
    line-height: 1;
    margin-bottom: 8px;
}

.login-title span {
    color: transparent;
    -webkit-text-stroke: 2px var(--text-1);
}

.login-subtitle {
    font-size: 0.82rem;
    color: var(--text-3);
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 40px;
}

.login-input-wrap {
    position: relative;
    margin-bottom: 8px;
}

.login-input-wrap input {
    width: 100%;
    padding: 16px 52px 16px 20px;
    font-family: 'Inter', sans-serif;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-1);
    background: var(--bg-page);
    border: 2px solid var(--border);
    border-radius: var(--r-sm);
    outline: none;
    transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.login-input-wrap input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(198,241,53,0.15);
}

.login-input-wrap input::placeholder {
    color: var(--text-4);
    font-weight: 400;
}

.login-input-user {
    margin-bottom: 12px;
}

.login-input-user input {
    padding-right: 48px;
}

.login-field-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-4);
    pointer-events: none;
}

.login-toggle {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-4);
    padding: 4px;
    transition: color 0.2s;
    display: flex;
}

.login-toggle:hover { color: var(--text-2); }

.login-error {
    font-size: 0.78rem;
    color: var(--red);
    font-weight: 600;
    min-height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-btn {
    width: 100%;
    padding: 16px;
    font-family: 'Inter', sans-serif;
    font-size: 0.88rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--bg-dark);
    background: var(--accent);
    border: none;
    border-radius: var(--r-sm);
    cursor: pointer;
    transition: all 0.3s var(--ease);
    position: relative;
    overflow: hidden;
}

.login-btn:hover {
    background: var(--accent-dim);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(198,241,53,0.3);
}

.login-btn:active {
    transform: translateY(0);
}

.login-footer {
    margin-top: 32px;
    font-size: 0.65rem;
    color: var(--text-4);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%      { transform: translateX(-12px); }
    40%      { transform: translateX(10px); }
    60%      { transform: translateX(-8px); }
    80%      { transform: translateX(6px); }
}

.login-card.shake {
    animation: shake 0.45s var(--ease) both;
}

/* Hide content when login is active */
body:has(#login-gate:not(.hidden)) .hero,
body:has(#login-gate:not(.hidden)) .toc,
body:has(#login-gate:not(.hidden)) section,
body:has(#login-gate:not(.hidden)) footer,
body:has(#login-gate:not(.hidden)) #content {
    filter: blur(8px);
    pointer-events: none;
    user-select: none;
}

@media (max-width: 480px) {
    .login-card {
        margin: 16px;
        padding: 40px 28px 36px;
    }
    .login-title { font-size: 36px; }
}