/* ================================================
   AI漫画Studio — ホームページ CSS
   テーマ: ホワイト系・誠実・プロフェッショナル
   ================================================ */

/* === RESET & VARIABLES === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
    --bg:#fafbff;
    --bg2:#f0f2f8;
    --bg3:#e8eaf3;
    --surface:#fff;
    --surface-border:rgba(0,0,0,.08);
    --text:#1a1a2e;
    --text2:#555;
    --text3:#888;
    --accent:#6c5ce7;
    --accent2:#5a4bd1;
    --accent-light:rgba(108,92,231,.08);
    --accent-glow:rgba(108,92,231,.15);
    --cyan:#00b894;
    --cyan-light:rgba(0,184,148,.08);
    --pink:#e84393;
    --gold:#fdcb6e;
    --grad1:linear-gradient(135deg,#6c5ce7,#00b894);
    --grad2:linear-gradient(135deg,#6c5ce7,#e84393);
    --radius:16px;
    --radius-sm:10px;
    --shadow:0 2px 20px rgba(0,0,0,.06);
    --shadow-lg:0 8px 40px rgba(0,0,0,.08);
}

html{scroll-behavior:smooth;font-size:16px}
body{
    font-family:'Noto Sans JP','Inter',sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.8;
    overflow-x:hidden;
}
a{color:var(--accent);text-decoration:none;transition:color .3s}
a:hover{color:var(--accent2)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1100px;margin:0 auto;padding:0 24px}

/* === NAV === */
.nav{
    position:fixed;top:0;left:0;right:0;z-index:100;
    padding:14px 0;
    background:rgba(250,251,255,.85);
    backdrop-filter:blur(20px);
    border-bottom:1px solid rgba(0,0,0,.06);
    transition:all .3s ease;
}
.nav.scrolled{
    box-shadow:0 2px 20px rgba(0,0,0,.06);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-size:1.2rem;font-weight:900;letter-spacing:-.02em;color:var(--text)}
.nav-logo .accent{color:var(--accent)}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{color:var(--text2);font-size:.9rem;font-weight:500;transition:color .3s}
.nav-links a:hover{color:var(--accent)}

/* === BUTTONS === */
.btn{
    display:inline-flex;align-items:center;gap:8px;
    padding:14px 36px;border:none;border-radius:60px;
    font-size:1rem;font-weight:700;cursor:pointer;
    transition:all .3s ease;text-decoration:none;
}
.btn-primary{
    background:var(--grad1);color:#fff;
    box-shadow:0 4px 20px var(--accent-glow);
}
.btn-primary:hover{
    transform:translateY(-2px);
    box-shadow:0 8px 30px var(--accent-glow);
    color:#fff;
}
.btn-outline{
    background:transparent;color:var(--accent);
    border:2px solid rgba(108,92,231,.3);
}
.btn-outline:hover{
    border-color:var(--accent);
    background:var(--accent-light);
}
.btn-white{
    background:#fff;color:var(--accent);
    box-shadow:var(--shadow);
}
.btn-white:hover{
    transform:translateY(-2px);
    box-shadow:var(--shadow-lg);
    color:var(--accent);
}
.btn-sm{padding:10px 24px;font-size:.85rem}

/* === SECTIONS === */
.section{padding:100px 0}
.section-alt{background:var(--bg2)}
.section-label{
    display:inline-block;padding:6px 18px;border-radius:20px;
    background:var(--accent-light);color:var(--accent);
    font-size:.8rem;font-weight:700;letter-spacing:.05em;
    margin-bottom:16px;
}
.section-title{
    font-size:clamp(1.8rem,4vw,2.6rem);font-weight:900;
    line-height:1.3;margin-bottom:16px;color:var(--text);
}
.section-sub{
    color:var(--text2);font-size:1.05rem;
    max-width:640px;margin-bottom:48px;
}
.center{text-align:center}
.mx-auto{margin-left:auto;margin-right:auto}
.grad-text{
    background:var(--grad1);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;
    background-clip:text;
}

/* === FADE IN === */
.fade-in{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* === HERO === */
.hero{
    padding:140px 0 80px;
    background:linear-gradient(180deg,#f5f3ff 0%,var(--bg) 100%);
    position:relative;overflow:hidden;
}
.hero::before{
    content:'';position:absolute;
    width:600px;height:600px;
    background:radial-gradient(circle,rgba(108,92,231,.08) 0%,transparent 70%);
    top:-100px;right:-100px;pointer-events:none;
}
.hero-grid{
    display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.hero-content{position:relative;z-index:2}
.hero-badge{
    display:inline-flex;align-items:center;gap:8px;
    padding:8px 20px;border-radius:40px;
    background:var(--accent-light);
    border:1px solid rgba(108,92,231,.15);
    font-size:.85rem;color:var(--accent);font-weight:600;
    margin-bottom:24px;
}
.hero h1{
    font-size:clamp(2rem,4.5vw,3.2rem);font-weight:900;
    line-height:1.2;margin-bottom:20px;letter-spacing:-.02em;
    color:var(--text);
}
.hero p{
    font-size:1.1rem;color:var(--text2);
    margin-bottom:32px;max-width:500px;line-height:1.8;
}
.hero-buttons{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual{position:relative;z-index:1}
.hero-visual img{
    width:100%;border-radius:var(--radius);
    box-shadow:var(--shadow-lg);
    border:1px solid rgba(0,0,0,.06);
}

/* === PILLARS === */
.pillars-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pillar-card{
    padding:36px 28px;border-radius:var(--radius);
    background:var(--surface);border:1px solid var(--surface-border);
    box-shadow:var(--shadow);
    transition:all .3s ease;text-align:center;
}
.pillar-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--shadow-lg);
    border-color:rgba(108,92,231,.2);
}
.pillar-icon{
    width:64px;height:64px;border-radius:16px;
    display:flex;align-items:center;justify-content:center;
    font-size:1.8rem;margin:0 auto 20px;
}
.pillar-card h3{font-size:1.15rem;font-weight:700;margin-bottom:10px}
.pillar-card p{color:var(--text2);font-size:.93rem;line-height:1.7}
.pillar-link{
    display:inline-flex;align-items:center;gap:4px;
    margin-top:16px;font-size:.85rem;font-weight:600;color:var(--accent);
}
.pillar-link:hover{gap:8px}

/* === SHOWCASE === */
.showcase-item{
    display:grid;grid-template-columns:1fr 1fr;
    gap:48px;align-items:center;
    padding:48px 0;
}
.showcase-item.reverse{direction:rtl}
.showcase-item.reverse > *{direction:ltr}
.showcase-img{
    border-radius:var(--radius);overflow:hidden;
    box-shadow:var(--shadow-lg);
    border:1px solid var(--surface-border);
    transition:transform .4s ease;
}
.showcase-img:hover{transform:scale(1.02)}
.showcase-img img{width:100%;height:auto;display:block}
.showcase-badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 14px;border-radius:20px;font-size:.75rem;
    font-weight:700;margin-bottom:14px;
    background:var(--accent-light);color:var(--accent);
    border:1px solid rgba(108,92,231,.15);
}
.showcase-text h3{font-size:1.4rem;font-weight:900;margin-bottom:12px;line-height:1.3}
.showcase-text p{color:var(--text2);font-size:.95rem;margin-bottom:16px;line-height:1.8}
.showcase-points{list-style:none;display:flex;flex-direction:column;gap:8px}
.showcase-points li{
    display:flex;align-items:flex-start;gap:8px;
    font-size:.9rem;color:var(--text2);
}
.showcase-points li::before{
    content:'✦';color:var(--accent);font-weight:700;flex-shrink:0;
}

/* === WORKFLOW === */
.workflow-steps{
    display:grid;grid-template-columns:repeat(3,1fr);gap:0;
    max-width:900px;margin:0 auto;position:relative;
}
.workflow-steps::before{
    content:'';position:absolute;
    top:44px;left:calc(16.66% + 20px);right:calc(16.66% + 20px);
    height:3px;background:var(--grad1);border-radius:2px;z-index:0;
}
.workflow-step{text-align:center;position:relative;z-index:1}
.step-number{
    width:48px;height:48px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    font-size:1.1rem;font-weight:900;
    background:var(--grad1);color:#fff;
    margin:0 auto 20px;
    box-shadow:0 4px 16px var(--accent-glow);
}
.workflow-step h4{font-size:1rem;font-weight:700;margin-bottom:8px}
.workflow-step p{color:var(--text2);font-size:.88rem;line-height:1.6;max-width:240px;margin:0 auto}

/* === COMMUNITY === */
.community-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.community-card{
    padding:32px;border-radius:var(--radius);
    background:var(--surface);border:1px solid var(--surface-border);
    box-shadow:var(--shadow);transition:all .3s ease;
}
.community-card:hover{
    transform:translateY(-3px);box-shadow:var(--shadow-lg);
    border-color:rgba(108,92,231,.2);
}
.community-card .card-icon{font-size:2rem;margin-bottom:16px}
.community-card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.community-card p{color:var(--text2);font-size:.93rem;line-height:1.7}

/* === CTA SECTION === */
.cta-section{
    padding:80px 0;text-align:center;
    background:linear-gradient(135deg,#f5f3ff,#e8f8f5);
    position:relative;overflow:hidden;
}
.cta-section h2{
    font-size:clamp(1.6rem,3.5vw,2.4rem);
    font-weight:900;margin-bottom:16px;
}
.cta-section p{
    color:var(--text2);margin-bottom:32px;font-size:1.05rem;
}

/* === FOOTER === */
.footer{
    padding:40px 0;border-top:1px solid rgba(0,0,0,.06);
    background:var(--bg);
}
.footer-inner{
    display:flex;justify-content:space-between;align-items:center;
    flex-wrap:wrap;gap:16px;
}
.footer-links{display:flex;gap:24px}
.footer-links a{color:var(--text3);font-size:.85rem}
.footer-links a:hover{color:var(--accent)}
.footer-copy{color:var(--text3);font-size:.85rem}

/* === RESPONSIVE === */
@media(max-width:900px){
    .hero-grid{grid-template-columns:1fr;text-align:center}
    .hero p{margin-left:auto;margin-right:auto}
    .hero-buttons{justify-content:center}
    .hero-visual{max-width:500px;margin:0 auto}
    .pillars-grid{grid-template-columns:1fr}
    .showcase-item,.showcase-item.reverse{grid-template-columns:1fr;direction:ltr}
    .workflow-steps{grid-template-columns:1fr;gap:32px}
    .workflow-steps::before{display:none}
    .community-grid{grid-template-columns:1fr}
    .nav-links a:not(.btn){display:none}
}
@media(max-width:600px){
    .section{padding:64px 0}
    .hero{padding:120px 0 60px}
    .hero-buttons{flex-direction:column}
    .btn{width:100%;justify-content:center}
    .footer-inner{flex-direction:column;text-align:center}
}