/* ================================================
   Salieri's Library - Dark Academia Design System
   "Genius is born, Salieri is made."
   ================================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;1,400&family=IBM+Plex+Mono:wght@400;500&family=Noto+Serif+KR:wght@400;700&display=swap');

/* CSS Variables */
:root {
    /* Colors */
    --color-black: #111111;
    --color-deep-black: #0a0a0a;
    --color-paper: #F5F5DC;
    --color-paper-dark: #E8E4C9;
    --color-blood: #8B0000;
    --color-blood-light: #A52A2A;
    --color-gold: #C9A227;
    --color-gray: #3a3a3a;
    --color-gray-light: #6a6a6a;

    /* Typography */
    --font-serif: 'Playfair Display', 'Noto Serif KR', Georgia, serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s ease;
    --transition-slow: 0.8s ease;
}

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

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

body {
    font-family: var(--font-mono);
    background-color: var(--color-deep-black);
    color: var(--color-paper);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background Texture */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at top, rgba(139, 0, 0, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at bottom, rgba(17, 17, 17, 1) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* Noise Texture Overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: -1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
}

h3 {
    font-size: clamp(1.2rem, 2vw, 1.8rem);
}

p {
    font-size: 1rem;
    max-width: 65ch;
}

/* Links */
a {
    color: var(--color-paper);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-blood-light);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container--narrow {
    max-width: 800px;
}

/* Main Layout */
.main {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--space-lg) var(--space-md);
}

/* Cursor Blink Animation */
@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background-color: var(--color-paper);
    margin-left: 4px;
    animation: blink 1s infinite;
    vertical-align: text-bottom;
}

/* Typewriter Effect Container */
.typewriter {
    overflow: hidden;
    white-space: nowrap;
    border-right: 2px solid var(--color-paper);
    animation: typing 3s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: var(--color-paper); }
}

/* Form Styles */
.form {
    width: 100%;
    max-width: 600px;
}

.form__group {
    margin-bottom: var(--space-md);
}

.form__label {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    margin-bottom: var(--space-xs);
    color: var(--color-paper-dark);
}

.form__input,
.form__textarea,
.form__select {
    width: 100%;
    padding: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 1rem;
    background-color: rgba(245, 245, 220, 0.05);
    border: 1px solid var(--color-gray);
    color: var(--color-paper);
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
    outline: none;
    border-color: var(--color-blood);
    background-color: rgba(245, 245, 220, 0.1);
}

.form__textarea {
    min-height: 150px;
    resize: vertical;
}

.form__select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23F5F5DC' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
}

.form__select option {
    background-color: var(--color-black);
    color: var(--color-paper);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 1px solid var(--color-paper);
    background-color: transparent;
    color: var(--color-paper);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn:hover {
    background-color: var(--color-paper);
    color: var(--color-black);
}

.btn--primary {
    background-color: var(--color-blood);
    border-color: var(--color-blood);
}

.btn--primary:hover {
    background-color: var(--color-blood-light);
    border-color: var(--color-blood-light);
    color: var(--color-paper);
}

.btn--large {
    padding: var(--space-sm) var(--space-lg);
    font-size: 1rem;
}

/* Cards */
.card {
    background-color: rgba(17, 17, 17, 0.8);
    border: 1px solid var(--color-gray);
    padding: var(--space-md);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.card:hover {
    border-color: var(--color-blood);
    transform: translateY(-4px);
}

.card__title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    margin-bottom: var(--space-sm);
}

.card__description {
    font-size: 0.9rem;
    color: var(--color-gray-light);
    margin-bottom: var(--space-sm);
}

.card__price {
    font-size: 1.1rem;
    color: var(--color-gold);
    font-weight: 500;
}

/* Grid */
.grid {
    display: grid;
    gap: var(--space-md);
}

.grid--2 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Header/Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background-color: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid var(--color-gray);
}

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

.nav__logo {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-paper);
}

.nav__links {
    display: flex;
    gap: var(--space-md);
    list-style: none;
}

.nav__link {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Quote/Slogan */
.slogan {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.2rem;
    color: var(--color-gray-light);
    text-align: center;
    margin: var(--space-md) 0;
}

/* Divider */
.divider {
    width: 60px;
    height: 1px;
    background-color: var(--color-blood);
    margin: var(--space-md) auto;
}

/* Fade In Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.fade-in--delay-1 { animation-delay: 0.2s; opacity: 0; }
.fade-in--delay-2 { animation-delay: 0.4s; opacity: 0; }
.fade-in--delay-3 { animation-delay: 0.6s; opacity: 0; }
.fade-in--delay-4 { animation-delay: 0.8s; opacity: 0; }

/* Verdict Page Styles */
.verdict {
    text-align: center;
}

.verdict__percentage {
    font-family: var(--font-serif);
    font-size: clamp(4rem, 15vw, 10rem);
    color: var(--color-blood);
    line-height: 1;
    margin: var(--space-md) 0;
}

.verdict__message {
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto;
}

/* Prescription Page Styles */
.prescription {
    text-align: center;
}

.prescription__hope {
    color: var(--color-gold);
}

/* Certificate Styles */
.certificate {
    background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
    border: 2px solid var(--color-gold);
    padding: var(--space-lg);
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.certificate::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    border: 1px solid var(--color-gray);
    pointer-events: none;
}

.certificate__title {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-gold);
    margin-bottom: var(--space-md);
}

.certificate__body {
    font-size: 1rem;
    line-height: 2;
    margin-bottom: var(--space-md);
}

.certificate__name {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-blood);
    border-bottom: 1px solid var(--color-blood);
    display: inline-block;
    padding: 0 var(--space-md);
    margin: var(--space-sm) 0;
}

.certificate__date {
    font-size: 0.9rem;
    color: var(--color-gray-light);
    margin-top: var(--space-md);
}

.certificate__seal {
    font-family: var(--font-serif);
    font-size: 0.8rem;
    color: var(--color-gold);
    margin-top: var(--space-md);
    letter-spacing: 0.2em;
}

/* Shop Page Styles */
.shop__category {
    margin-bottom: var(--space-lg);
}

.shop__category-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--color-gray);
}

/* Social Share Buttons */
.share-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    margin-top: var(--space-md);
}

.share-btn {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.85rem;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-blood { color: var(--color-blood); }
.text-gold { color: var(--color-gold); }
.text-muted { color: var(--color-gray-light); }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }

/* Responsive */
@media (max-width: 768px) {
    .nav__links {
        display: none;
    }

    .main {
        padding: var(--space-md) var(--space-sm);
    }

    .certificate {
        padding: var(--space-md);
    }
}

/* Hidden */
.hidden {
    display: none !important;
}

/* Loading State */
.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* Step Indicator */
.step-indicator {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-blood);
    margin-bottom: 1rem;
}

/* Method Preview */
.method-preview {
    background: rgba(245, 245, 220, 0.03);
    border: 1px solid var(--color-gray);
    padding: 1.5rem;
    text-align: left;
    max-width: 400px;
    margin: 1.5rem auto;
}

.method-preview__title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-light);
    margin-bottom: 1rem;
}

.method-preview__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.method-preview__list li {
    font-size: 0.9rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.method-preview__list li:last-child {
    border-bottom: none;
}

.method-preview__list strong {
    color: var(--color-paper);
}

.method-preview__source {
    font-size: 0.7rem;
    color: var(--color-gray-light);
    margin-top: 1rem;
    font-style: italic;
}

/* Verdict Breakdown */
.verdict-breakdown {
    max-width: 500px;
    margin: 2rem auto;
    text-align: left;
}

.verdict-breakdown__title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-light);
    margin-bottom: 1.5rem;
    text-align: center;
}

.factor {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.factor:last-child {
    border-bottom: none;
}

.factor__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.factor__name {
    font-size: 0.9rem;
    font-weight: 500;
}

.factor__score {
    font-size: 0.85rem;
    color: var(--color-gold);
}

.factor__bar {
    height: 4px;
    background: var(--color-gray);
    margin-bottom: 0.5rem;
}

.factor__bar-fill {
    height: 100%;
    background: var(--color-blood);
    transition: width 1s ease;
}

.factor__description {
    font-size: 0.8rem;
    color: var(--color-gray-light);
    line-height: 1.5;
}

/* Total Score */
.total-score {
    text-align: center;
    padding: 2rem;
    border: 1px solid var(--color-gray);
    margin: 2rem auto;
    max-width: 400px;
}

.total-score__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-light);
    margin-bottom: 0.5rem;
}

.total-score__value {
    font-family: var(--font-serif);
    font-size: 3rem;
    color: var(--color-paper);
}

.total-score__context {
    font-size: 0.85rem;
    color: var(--color-gray-light);
    margin-top: 1rem;
    line-height: 1.6;
}

/* Methodology Note */
.methodology-note {
    font-size: 0.75rem;
    color: var(--color-gray-light);
    text-align: center;
    max-width: 500px;
    margin: 2rem auto;
    padding: 1rem;
    border: 1px dashed var(--color-gray);
}

.methodology-note a {
    color: var(--color-gray-light);
    text-decoration: underline;
}