/* ===== KICK-NESS Design System ===== */

:root {
    /* Brand colors */
    --navy: #1B2564;
    --red: #D42A2A;
    --red-bright: #E83E3E;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F8;
    --bg-card: #FFFFFF;
    --white: #FFFFFF;
    --gray: #555555;
    --gray-dark: #888888;
    --line-green: #06C755;

    /* Type colors */
    --type-a: #E83E3E;
    --type-b: #3E7EE8;
    --type-c: #3EC77A;
    --type-d: #C7A33E;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Font */
    --font: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Shadows */
    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.08);
    --shadow-btn: 0 4px 16px rgba(212, 42, 42, 0.4);
}

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

html {
    font-size: 17px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: #333;
    line-height: 1.7;
    letter-spacing: 0.02em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ===== Typography ===== */
.heading-lg {
    font-size: clamp(1.5rem, 5vw, 2.25rem);
    font-weight: 900;
    color: #1a1a1a;
    line-height: 1.4;
}

.heading-md {
    font-size: clamp(1.25rem, 4vw, 1.75rem);
    font-weight: 700;
    color: #1a1a1a;
    line-height: 1.4;
}

.heading-sm {
    font-size: clamp(1rem, 3vw, 1.25rem);
    font-weight: 700;
    color: #1a1a1a;
    line-height: 1.4;
}

.text-accent {
    color: var(--red);
}

.text-sub {
    color: var(--gray-dark);
    font-size: 0.8125rem;
}

/* ===== Buttons ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 16px 40px;
    background: var(--red);
    color: var(--white);
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-btn);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--red-bright);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(212, 42, 42, 0.5);
}

.btn-primary:focus-visible,
.btn-line:focus-visible {
    outline: 2px solid var(--white);
    outline-offset: 4px;
}

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

.btn-arrow {
    font-size: 1.25rem;
    transition: transform 0.3s ease;
}

.btn-primary:hover .btn-arrow {
    transform: translateX(4px);
}

.btn-pulse {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: var(--shadow-btn); }
    50% { box-shadow: 0 4px 32px rgba(212, 42, 42, 0.6); }
}

.btn-line {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 16px 40px;
    background: var(--line-green);
    color: var(--white);
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    box-shadow: 0 4px 16px rgba(6, 199, 85, 0.4);
    transition: all 0.3s ease;
}

.btn-line:hover {
    background: #05B34C;
    transform: translateY(-2px);
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===== Section ===== */
.section {
    padding: var(--space-3xl) 0;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--red-bright);
    border: 1px solid var(--red);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(1.625rem, 6vw, 2.25rem);
    font-weight: 900;
    color: #1a1a1a;
    line-height: 1.4;
    margin-bottom: var(--space-lg);
}

.section-title .accent {
    color: var(--red);
}

/* ===== Card ===== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    border: 1px solid #e0e0e0;
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

/* ===== Disclaimer ===== */
.disclaimer {
    font-size: 0.75rem;
    color: var(--gray-dark);
    line-height: 1.6;
    margin-top: var(--space-md);
}