/* 
===================================================
   TANOMARU PIANO ACADEMY - DESIGN SYSTEM PREMIUM
===================================================
*/

:root {
    /* Main Colors */
    --black-deep: #000000;
    --black-soft: #0A0A0A;
    --blue-primary: #0B1F5B;
    --blue-alt-1: #0E2A7A;
    --blue-alt-2: #123D9A;
    --gold-primary: #D4AF37;
    --gold-light: #F2D27A;
    --gold-dark: #9C6B12;
    --white: #FFFFFF;
    --gray-light: #EAEAEA;
    --gray-medium: #BFBFBF;

    /* Semantic Definitions */
    --bg-main: var(--black-deep);
    --bg-card: rgba(10, 10, 10, 0.7);
    --bg-card-blue: rgba(11, 31, 91, 0.3);
    --border-gold: rgba(212, 175, 55, 0.2);
    --border-gold-subtle: rgba(212, 175, 55, 0.08);

    /* Typography - All Sans-Serif (Montserrat) */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Montserrat', sans-serif;

    /* Layout & Spacing */
    --container-width: 1200px;
    --container-medium: 900px;
    --container-small: 700px;
    
    --spacing-huge: 160px;
    --spacing-large: 100px;
    --spacing-medium: 60px;
    --spacing-small: 30px;
    --spacing-xs: 15px;
}

/* 
===================================================
   GLOBAL RESET & BASE 
===================================================
*/

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

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

body {
    background-color: var(--bg-main);
    color: var(--white);
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--white);
    line-height: 1.15;
    margin-bottom: var(--spacing-small);
}

h1 { font-weight: 800; letter-spacing: -1.5px; }
h2 { font-weight: 700; letter-spacing: -1px; }
h3 { font-weight: 600; }

p {
    color: var(--gray-light);
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
}

a {
    text-decoration: none;
    color: inherit;
}

/* 
===================================================
   UTILITIES & LAYOUT
===================================================
*/

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 5%;
}

.container-medium {
    max-width: var(--container-medium);
}

.container-small {
    max-width: var(--container-small);
}

section {
    padding: var(--spacing-huge) 0;
}

.text-center { text-align: center; }
.gold-text { color: var(--gold-primary); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.two-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.align-center { align-items: center; }

.margin-top-large { margin-top: var(--spacing-large); }
.margin-top-medium { margin-top: var(--spacing-medium); }
.no-margin-bottom { margin-bottom: 0 !important; }

/* 
===================================================
   TOP BAR 
===================================================
*/

.topbar {
    background-color: var(--blue-primary);
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    z-index: 100;
}

.topbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar-logo {
    height: 35px;
    width: auto;
    object-fit: contain;
}

.topbar-text {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 2.5px;
    color: var(--gold-primary);
    text-transform: uppercase;
}

/* 
===================================================
   BUTTONS (CTA)
===================================================
*/

.cta-button {
    display: inline-block;
    font-family: var(--font-heading);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: 20px 45px;
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
    cursor: pointer;
    font-size: 1rem;
    text-align: center;
    border: none;
    position: relative;
    overflow: hidden;
}

.cta-button.primary {
    background: var(--gold-primary);
    color: var(--black-deep);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.15);
}

.cta-button.primary:hover {
    background: var(--gold-light);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(212, 175, 55, 0.25);
}

.cta-button.large {
    font-size: 1.15rem;
    padding: 24px 60px;
}

/* 
===================================================
   SECTION SPECIFIC STYLES
===================================================
*/

/* 1. HERO SECTION */
.hero-section {
    position: relative;
    min-height: 95vh;
    display: flex;
    align-items: center;
    padding-top: 5vh;
    padding-bottom: 15vh;
    background-color: var(--black-deep);
}

.hero-background {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: 0;
    overflow: hidden;
}

.hero-image-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    opacity: 0.3; /* Subtle image */
    filter: grayscale(100%) contrast(1.2);
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(90deg, var(--black-deep) 0%, rgba(0,0,0,0.85) 50%, rgba(0,0,0,0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.eyebrow {
    margin-bottom: var(--spacing-xs);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    font-weight: 600;
}

.eyebrow-text { color: var(--gold-primary); }
.eyebrow-divider { color: var(--gray-medium); margin: 0 15px; font-weight: 300; }
.eyebrow-sub { color: var(--gray-medium); }

.headline-main {
    font-size: 4rem;
    margin-bottom: var(--spacing-small);
    line-height: 1.1;
    color: var(--white);
}

.hero-subheadline {
    font-size: 1.35rem;
    font-weight: 400;
    color: var(--gray-light);
    margin-bottom: var(--spacing-medium);
    max-width: 800px;
}

/* Bullet Lists Premium */
.clean-bullets {
    list-style: none;
    margin-bottom: var(--spacing-medium);
}

.clean-bullets li {
    font-size: 1.1rem;
    color: var(--gray-light);
    margin-bottom: 16px;
    position: relative;
    padding-left: 28px;
    font-weight: 500;
}

.clean-bullets li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px; height: 6px;
    background-color: var(--gold-primary);
    border-radius: 50%;
}

/* 2. PROMISE SECTION (CARD) */
.promise-section {
    margin-top: -12vh;
    position: relative;
    z-index: 10;
    padding: 0;
}

.premium-card {
    background: var(--bg-card);
    border: 1px solid var(--border-gold-subtle);
    padding: 50px;
    border-radius: 2px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.large-card {
    padding: 80px 10vw;
    background: linear-gradient(145deg, var(--black-soft), var(--black-deep));
}

.card-title-gold {
    font-size: 1.8rem;
    color: var(--gold-primary);
    text-align: center;
    margin-bottom: var(--spacing-medium);
    letter-spacing: 1px;
}

.promise-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    text-align: left;
    max-width: 700px;
    margin: 0 auto;
}

.promise-list li {
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--white);
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
}

.promise-list li::before {
    content: '✓';
    color: var(--gold-primary);
    font-size: 1.4rem;
    margin-right: 20px;
    font-weight: 800;
}

/* 3. PROBLEM SECTION */
.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: var(--spacing-medium);
}

.text-block { max-width: 800px; }

.highlight-text-gold {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--gold-primary);
    margin-top: var(--spacing-small);
    border-left: 2px solid var(--gold-primary);
    padding-left: 30px;
}

.pain-points-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    margin-top: var(--spacing-large);
}

.dark-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 35px 30px;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--gray-light);
    border-radius: 2px;
}

/* 4. REFRAMING SECTION */
.reframing-section {
    background-color: var(--black-soft);
    border-top: 1px solid rgba(255,255,255,0.03);
    border-bottom: 1px solid rgba(255,255,255,0.03);
}

.vertical-gold-line-container {
    padding-left: 40px;
    border-left: 3px solid var(--gold-primary);
    margin-bottom: var(--spacing-large);
}

.reframing-content {
    font-size: 1.2rem;
    max-width: 750px;
}

.accent-card {
    background: linear-gradient(135deg, rgba(11, 31, 91, 0.4), var(--black-soft));
    border: 1px solid var(--blue-alt-1);
    text-align: center;
    padding: 60px;
}

.accent-card p {
    font-size: 1.3rem;
    color: var(--white);
}

/* 5. SOLUTION SECTION */
.tech-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    border-radius: 2px;
}

.solution-image-placeholder {
    position: relative;
    height: 600px;
    border: 1px solid var(--border-gold-subtle);
}

.glow-effect {
    position: absolute;
    top: -20px; left: -20px; right: -20px; bottom: -20px;
    background: radial-gradient(circle at center, rgba(212, 175, 55, 0.08), transparent 70%);
    z-index: -1;
}

.subsection-title {
    font-size: 1.5rem;
    color: var(--gold-primary);
    margin-top: var(--spacing-medium);
}

/* 6. METHOD (TANOMARU) */
.method-section {
    background-color: var(--blue-primary);
}

.method-conclusion {
    background: rgba(0,0,0,0.5);
    border-color: var(--gold-dark);
}

.method-conclusion p { font-size: 1.2rem; font-weight: 500; color: var(--gold-light); }

/* 7. WHAT TO LEARN */
.learn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: var(--spacing-large);
}

.small-card {
    padding: 40px 30px;
    font-size: 1.05rem;
    font-weight: 500;
    display: flex;
    align-items: center;
}

.small-card::before {
    content: '';
    display: inline-block;
    width: 24px; height: 1px;
    background-color: var(--gold-primary);
    margin-right: 15px;
    flex-shrink: 0;
}

.support-phrase {
    font-size: 1.2rem;
    font-weight: 600;
    max-width: 800px; margin: 0 auto;
}

/* 8. REPERTOIRE */
.repertoire-section {
    background-color: var(--black-soft);
}

.repertoire-content { max-width: 800px; margin: 0 auto; }

.repertoire-footer {
    margin-top: var(--spacing-medium);
    padding-top: var(--spacing-small);
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* 9. AUDIENCE */
.check-bullets li::before { content: '✓'; color: var(--gold-primary); font-size: 1.2rem; }
.cross-bullets li::before { content: '✕'; color: var(--gray-medium); font-size: 1.2rem; background: none; }
.cross-bullets li { color: var(--gray-medium); font-weight: 400; padding-left: 20px;}
.border-subtle { border-color: rgba(255,255,255,0.05); background: transparent; }
.card-title-gray { color: var(--gray-medium); font-size: 1.8rem; margin-bottom: var(--spacing-small); }

/* 10. OFFER */
.offer-section {
    background: radial-gradient(circle at top, var(--blue-primary) 0%, var(--black-deep) 100%);
}

.flex-card {
    display: flex; align-items: center; justify-content: center;
    padding: 50px 30px; min-height: 200px;
}
.flex-card p { font-size: 1.15rem; font-weight: 600; color: var(--white); margin: 0; }

.offer-reinforcement { font-size: 1.25rem; max-width: 700px; margin-left: auto; margin-right: auto; }

/* Pricing & Guarantee */
.pricing-block {
    text-align: center;
    margin: 40px auto 30px;
}
.price-installments {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--gold-primary);
    line-height: 1;
    letter-spacing: -1px;
}
.price-cash {
    font-size: 1.15rem;
    color: var(--gray-medium);
    margin-top: 10px;
    font-weight: 500;
}
.guarantee-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    color: var(--gray-light);
    margin-top: 25px;
    padding: 12px 25px;
    border: 1px solid var(--border-gold-subtle);
    border-radius: 2px;
    background: rgba(255,255,255,0.02);
    font-weight: 500;
}
.guarantee-badge::before {
    content: '🔒';
    margin-right: 12px;
    font-size: 1.1rem;
}

/* 11. AUTHORITY */
.authority-section {
    background-color: var(--black-soft);
    padding: var(--spacing-huge) 0;
}

.authority-image-wrapper {
    position: relative;
    height: 700px;
}

.authority-image {
    width: 100%; height: 100%; object-fit: cover;
}

.glow-effect.behind {
    top: -50px; left: -50px; width: 120%; height: 120%;
}

.authority-name { font-size: 3.5rem; margin-bottom: 10px; }
.authority-line { width: 80px; height: 3px; background: var(--gold-primary); margin-bottom: 20px; }
.authority-subtitle { font-size: 1rem; letter-spacing: 3px; color: var(--gray-medium); margin-bottom: 40px; }

/* 12. FAQ */
.faq-list { display: flex; flex-direction: column; gap: 20px; }
.faq-card { padding: 40px; background: var(--black-deep); }
.faq-question { font-size: 1.25rem; margin-bottom: 15px; color: var(--gold-light); }
.faq-answer { font-size: 1.1rem; color: var(--gray-light); margin: 0; }

/* 13. FINAL CTA */
.final-cta-section {
    padding: 200px 0;
    background: var(--black-deep);
}

.final-headline { font-size: 3.8rem; max-width: 1000px; margin: 0 auto var(--spacing-small); }
.final-text { font-size: 1.3rem; max-width: 800px; margin: 0 auto var(--spacing-large); }
.support-cta { margin-top: 25px; font-size: 0.95rem; color: var(--gray-medium); letter-spacing: 1px; text-transform: uppercase; }

/* FOOTER */
.footer {
    background-color: var(--black-soft);
    padding: 80px 0 40px;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-logo {
    height: 40px; margin-bottom: 20px; opacity: 0.7;
}

.footer-tagline { font-size: 0.85rem; letter-spacing: 3px; text-transform: uppercase; color: var(--gray-medium); }
.footer-divider { width: 40px; height: 1px; background: var(--border-gold); margin: 30px auto; }
.footer-bottom { font-size: 0.8rem; color: var(--gray-medium); opacity: 0.5; }

/* 
===================================================
   ANIMATIONS 
===================================================
*/

.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1.2s cubic-bezier(0.2, 0.8, 0.2, 1), transform 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
    will-change: opacity, transform;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 
===================================================
   RESPONSIVE DESIGN 
===================================================
*/

@media (max-width: 992px) {
    .headline-main, .final-headline { font-size: 3rem; }
    .two-columns { grid-template-columns: 1fr; gap: 50px; }
    .authority-grid { grid-template-columns: 1fr; }
    .authority-image-wrapper { height: 500px; order: -1; }
    .hero-content { padding-top: 10vh; }
    .grid-3 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    :root {
        --spacing-huge: 100px;
        --spacing-large: 60px;
        --spacing-medium: 40px;
    }
    .headline-main, .final-headline, .section-title { font-size: 2.2rem; }
    .topbar-container { flex-direction: column; gap: 10px; }
    .topbar-logo { height: 25px; }
    .topbar-text { text-align: center; font-size: 0.65rem; }
    .hero-subheadline { font-size: 1.15rem; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .promise-section { margin-top: 0; padding-top: var(--spacing-large); }
    .large-card { padding: 40px 20px; }
    .promise-list li { font-size: 1rem; }
    .cta-button { width: 100%; padding: 20px 0; }
}