/* Kakio V1 — Main Stylesheet */

:root {
    --color-primary: #1a56db;
    --color-primary-hover: #1648b8;
    --color-primary-light: #e8effc;
    --color-secondary: #f3f4f6;
    --color-success: #059669;
    --color-success-bg: #ecfdf5;
    --color-warning: #d97706;
    --color-warning-bg: #fffbeb;
    --color-error: #dc2626;
    --color-error-bg: #fef2f2;
    --color-text: #111827;
    --color-text-secondary: #6b7280;
    --color-text-muted: #9ca3af;
    --color-bg: #ffffff;
    --color-bg-subtle: #f9fafb;
    --color-border: #e5e7eb;
    --color-border-hover: #d1d5db;
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.08), 0 4px 6px rgba(0,0,0,0.04);
    --transition: 150ms ease;
    --max-width: 1140px;
}

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

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

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
}

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-hover); }

img { max-width: 100%; height: auto; }

/* Container */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.container-sm { max-width: 720px; }
.container-xs { max-width: 480px; }

/* Header */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.92); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex; align-items: center; justify-content: space-between;
    height: 64px; gap: 1rem;
}

.logo {
    display: flex; align-items: center; gap: .5rem;
    font-size: 1.25rem; font-weight: 800; color: var(--color-text);
    text-decoration: none;
}
.logo:hover { color: var(--color-text); }
.logo-icon { font-size: 1.5rem; }

.nav-links { display: flex; gap: .25rem; }
.nav-link {
    padding: .5rem .875rem; border-radius: var(--radius);
    color: var(--color-text-secondary); font-weight: 500; font-size: .9rem;
    transition: all var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--color-text); background: var(--color-secondary); }

.nav-actions { display: flex; align-items: center; gap: .75rem; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; padding: .25rem; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
    padding: .625rem 1.25rem; border-radius: var(--radius); border: 1px solid transparent;
    font-family: var(--font-family); font-weight: 600; font-size: .875rem;
    cursor: pointer; transition: all var(--transition); text-decoration: none;
    line-height: 1.4;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover { background: var(--color-primary-hover); color: #fff; }

.btn-outline { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn-outline:hover { background: var(--color-secondary); border-color: var(--color-border-hover); color: var(--color-text); }

.btn-ghost { background: transparent; color: var(--color-text-secondary); }
.btn-ghost:hover { background: var(--color-secondary); color: var(--color-text); }

.btn-sm { padding: .375rem .875rem; font-size: .8125rem; }
.btn-lg { padding: .75rem 1.75rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* Alerts */
.alert {
    padding: .875rem 1.25rem; border-radius: var(--radius); margin-bottom: 1.5rem;
    font-size: .875rem; font-weight: 500;
}
.alert-success { background: var(--color-success-bg); color: var(--color-success); border: 1px solid #a7f3d0; }
.alert-error { background: var(--color-error-bg); color: var(--color-error); border: 1px solid #fecaca; }

/* Badges */
.badge {
    display: inline-flex; padding: .2rem .6rem; border-radius: 20px;
    font-size: .75rem; font-weight: 600;
    background: var(--color-secondary); color: var(--color-text-secondary);
}
.badge-success { background: var(--color-success-bg); color: var(--color-success); }
.badge-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-error { background: var(--color-error-bg); color: var(--color-error); }

/* Forms */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: .375rem; font-weight: 600; font-size: .875rem; color: var(--color-text); }
.form-input {
    width: 100%; padding: .625rem .875rem; border: 1px solid var(--color-border);
    border-radius: var(--radius); font-family: var(--font-family); font-size: .9rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    background: var(--color-bg); color: var(--color-text);
}
.form-input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-light); }
.form-input-color { height: 42px; padding: .25rem; cursor: pointer; }
.form-hint { display: block; margin-top: .25rem; font-size: .8rem; color: var(--color-text-muted); }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; }
.form-check { display: flex; align-items: center; gap: .5rem; cursor: pointer; font-weight: 500; }
.form-check input { width: 18px; height: 18px; cursor: pointer; }
.form-textarea-lg { font-family: monospace; font-size: .85rem; line-height: 1.5; }
.form-card { background: var(--color-bg); padding: 2rem; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }

/* Tables */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.table th { text-align: left; padding: .75rem 1rem; background: var(--color-bg-subtle); font-weight: 600; color: var(--color-text-secondary); border-bottom: 1px solid var(--color-border); white-space: nowrap; }
.table td { padding: .75rem 1rem; border-bottom: 1px solid var(--color-border); vertical-align: middle; }
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: var(--color-bg-subtle); }
.table-sm th, .table-sm td { padding: .5rem .75rem; font-size: .8125rem; }

/* Cards */
.card {
    background: var(--color-bg); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); overflow: hidden;
}
.card-sm { max-width: 640px; }
.card-header { display: flex; align-items: center; justify-content: space-between; padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--color-border); }
.card-header h2 { font-size: 1.05rem; font-weight: 700; margin: 0; }
.card-body { padding: 1.5rem; }
.card-footer { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.5rem; border-top: 1px solid var(--color-border); background: var(--color-bg-subtle); }
.card-empty { padding: 3rem 1.5rem; text-align: center; color: var(--color-text-muted); }
.card-empty .btn { margin-top: 1rem; }

/* Code */
.code-inline { font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace; font-size: .8rem; background: var(--color-bg-subtle); padding: .15rem .4rem; border-radius: 4px; color: var(--color-primary); word-break: break-all; }
.code-block { background: #1e293b; color: #e2e8f0; padding: 1.25rem; border-radius: var(--radius); overflow-x: auto; font-family: 'SF Mono', Monaco, monospace; font-size: .825rem; line-height: 1.6; margin: 1rem 0; white-space: pre-wrap; word-break: break-all; }
.code-block code { color: inherit; background: none; padding: 0; }
.code-block-wrapper { position: relative; }
.code-block-wrapper .copy-btn { position: absolute; top: .5rem; right: .5rem; color: #94a3b8; border: 1px solid #475569; }
.code-block-wrapper .copy-btn:hover { color: #e2e8f0; background: #334155; }

/* Pagination */
.pagination { display: flex; gap: .25rem; padding: 1rem 1.5rem; justify-content: center; }

/* Text helpers */
.text-muted { color: var(--color-text-muted); font-size: .85rem; }
.text-error { color: var(--color-error); font-size: .85rem; }

/* Hero */
.hero { padding: 5rem 0 4rem; background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-subtle) 100%); }
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.hero-badge { display: inline-block; padding: .35rem .875rem; background: var(--color-primary-light); color: var(--color-primary); border-radius: 20px; font-size: .8125rem; font-weight: 600; margin-bottom: 1.25rem; }
.hero h1 { font-size: 2.75rem; font-weight: 800; line-height: 1.15; letter-spacing: -.02em; margin-bottom: 1.25rem; }
.hero-desc { font-size: 1.125rem; color: var(--color-text-secondary); line-height: 1.65; margin-bottom: 2rem; max-width: 520px; }
.hero-actions { display: flex; gap: .75rem; flex-wrap: wrap; }
.hero-sub { margin-top: 1rem; font-size: .8125rem; color: var(--color-text-muted); }

/* Mock banner */
.hero-visual { display: flex; justify-content: center; }
.mock-banner { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); padding: 2rem; max-width: 380px; width: 100%; }
.mock-banner-inner h3 { font-size: 1.05rem; margin-bottom: .5rem; }
.mock-banner-inner p { font-size: .85rem; color: var(--color-text-secondary); margin-bottom: 1.25rem; line-height: 1.5; }
.mock-banner-buttons { display: flex; gap: .5rem; flex-wrap: wrap; }
.mock-branding { display: block; margin-top: 1rem; color: var(--color-text-muted); font-size: .7rem; text-align: center; }

/* Page hero */
.page-hero { padding: 3.5rem 0 2.5rem; background: var(--color-bg-subtle); border-bottom: 1px solid var(--color-border); text-align: center; }
.page-hero h1 { font-size: 2.25rem; font-weight: 800; margin-bottom: .75rem; }

/* Sections */
.section-title { font-size: 1.75rem; font-weight: 800; text-align: center; margin-bottom: .75rem; }
.section-desc { text-align: center; color: var(--color-text-secondary); max-width: 540px; margin: 0 auto 2.5rem; font-size: 1.05rem; }

/* Features grid */
.features-preview { padding: 5rem 0; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.feature-card { padding: 1.75rem; border: 1px solid var(--color-border); border-radius: var(--radius-lg); transition: all var(--transition); }
.feature-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feature-icon { font-size: 1.5rem; display: block; margin-bottom: .75rem; }
.feature-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: .5rem; }
.feature-card p { font-size: .875rem; color: var(--color-text-secondary); line-height: 1.55; }

/* Features detail */
.features-detail { padding: 3rem 0; }
.feature-detail-card { padding: 2rem 0; border-bottom: 1px solid var(--color-border); }
.feature-detail-card:last-child { border-bottom: none; }
.feature-detail-text h2 { font-size: 1.25rem; margin-bottom: .75rem; }
.feature-detail-text p { color: var(--color-text-secondary); margin-bottom: .75rem; line-height: 1.6; }

/* CTA */
.cta-section { padding: 4rem 0 5rem; }
.cta-box { background: linear-gradient(135deg, #1e3a5f 0%, var(--color-primary) 100%); color: #fff; padding: 3.5rem; border-radius: var(--radius-xl); text-align: center; }
.cta-box h2 { font-size: 1.75rem; font-weight: 800; margin-bottom: .75rem; }
.cta-box p { opacity: .85; margin-bottom: 1.5rem; font-size: 1.05rem; }
.cta-box .btn-primary { background: #fff; color: var(--color-primary); border-color: #fff; }
.cta-box .btn-primary:hover { background: #f0f0f0; }

/* Pricing */
.pricing-section { padding: 3rem 0 5rem; }
.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.pricing-card {
    border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 2rem 1.5rem;
    text-align: center; position: relative; transition: all var(--transition); background: var(--color-bg);
}
.pricing-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.pricing-popular { border-color: var(--color-primary); box-shadow: var(--shadow-md); }
.pricing-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--color-primary); color: #fff; padding: .25rem .875rem; border-radius: 20px; font-size: .75rem; font-weight: 600; }
.pricing-name { font-size: 1.15rem; font-weight: 700; margin-bottom: .75rem; }
.pricing-price { margin-bottom: .75rem; }
.price-amount { font-size: 2rem; font-weight: 800; }
.price-period { font-size: .85rem; color: var(--color-text-muted); }
.pricing-desc { font-size: .825rem; color: var(--color-text-secondary); margin-bottom: 1.25rem; line-height: 1.5; }
.pricing-features { list-style: none; text-align: left; margin-bottom: 1.5rem; }
.pricing-features li { padding: .35rem 0; font-size: .85rem; color: var(--color-text-secondary); }

/* Contact */
.contact-section { padding: 3rem 0 5rem; }

/* Auth pages */
.auth-section { padding: 4rem 0; min-height: 80vh; display: flex; align-items: center; }
.auth-card { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: 2.5rem; box-shadow: var(--shadow-md); }
.auth-header { text-align: center; margin-bottom: 2rem; }
.auth-header h1 { font-size: 1.5rem; font-weight: 800; margin-top: 1rem; margin-bottom: .25rem; }
.auth-header p { color: var(--color-text-secondary); font-size: .9rem; }
.auth-links { display: flex; justify-content: space-between; margin-top: 1.25rem; font-size: .85rem; }

/* Footer */
.site-footer { background: var(--color-bg-subtle); border-top: 1px solid var(--color-border); padding: 3rem 0 2rem; margin-top: 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 2rem; }
.footer-brand p { color: var(--color-text-secondary); font-size: .875rem; margin-top: .5rem; line-height: 1.55; }
.footer-col h4 { font-size: .85rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--color-text-muted); margin-bottom: .75rem; }
.footer-col a { display: block; color: var(--color-text-secondary); font-size: .875rem; padding: .2rem 0; }
.footer-col a:hover { color: var(--color-text); }
.footer-bottom { border-top: 1px solid var(--color-border); padding-top: 1.5rem; text-align: center; }
.footer-bottom p { font-size: .8rem; color: var(--color-text-muted); }

/* Banner preview */
.banner-preview { background: var(--color-bg-subtle); border-radius: var(--radius); padding: 2rem; min-height: 200px; display: flex; align-items: flex-end; }
.preview-banner { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 1.5rem; width: 100%; box-shadow: var(--shadow-md); }
.preview-banner h4 { font-size: .95rem; margin-bottom: .5rem; }
.preview-banner p { font-size: .8rem; color: var(--color-text-secondary); margin-bottom: 1rem; line-height: 1.5; }
.preview-buttons { display: flex; gap: .5rem; flex-wrap: wrap; }
.preview-btn-primary { padding: .4rem .875rem; border-radius: var(--radius); border: none; background: var(--color-primary); color: #fff; font-size: .8rem; font-weight: 600; cursor: pointer; font-family: var(--font-family); }
.preview-btn-secondary { padding: .4rem .875rem; border-radius: var(--radius); border: 1px solid var(--color-border); background: var(--color-secondary); color: var(--color-text); font-size: .8rem; font-weight: 600; cursor: pointer; font-family: var(--font-family); }
.preview-btn-ghost { padding: .4rem .875rem; border-radius: var(--radius); border: none; background: transparent; color: var(--color-text-secondary); font-size: .8rem; font-weight: 500; cursor: pointer; font-family: var(--font-family); text-decoration: underline; }

/* Responsive */
@media (max-width: 900px) {
    .hero .container { grid-template-columns: 1fr; gap: 2rem; }
    .hero h1 { font-size: 2rem; }
    .hero-visual { display: none; }
    .feature-grid { grid-template-columns: 1fr 1fr; }
    .pricing-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
    .nav-links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--color-border); padding: 1rem; box-shadow: var(--shadow-md); z-index: 99; }
    .nav-links.open { display: flex; }
    .nav-toggle { display: block; }
    .feature-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 1.75rem; }
    .auth-card { padding: 1.5rem; }
}