/* ============================================
   マネーシミュ - Design System & Common Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    /* Colors */
    --color-bg: #0a0a0f;
    --color-bg-card: rgba(255, 255, 255, 0.04);
    --color-bg-card-hover: rgba(255, 255, 255, 0.08);
    --color-bg-input: rgba(255, 255, 255, 0.06);
    --color-bg-input-focus: rgba(255, 255, 255, 0.1);
    --color-surface: #13131a;
    --color-surface-elevated: #1a1a24;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    
    --color-text-primary: #f0f0f5;
    --color-text-secondary: #8888a0;
    --color-text-tertiary: #55556a;
    
    --color-accent-1: #6366f1;
    --color-accent-2: #8b5cf6;
    --color-accent-3: #a78bfa;
    --color-accent-green: #34d399;
    --color-accent-blue: #60a5fa;
    --color-accent-amber: #fbbf24;
    --color-accent-rose: #fb7185;
    
    --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);
    --gradient-green: linear-gradient(135deg, #34d399, #6ee7b7);
    --gradient-text: linear-gradient(135deg, #6366f1 0%, #8b5cf6 30%, #a78bfa 60%, #60a5fa 100%);
    --gradient-card: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
    
    /* Typography */
    --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    --shadow-glow-green: 0 0 40px rgba(52, 211, 153, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Layout */
    --max-width: 1200px;
    --header-height: 72px;
}

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

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

input, select, button {
    font-family: inherit;
    font-size: inherit;
}

/* --- Background Effects --- */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse 80% 60% at 50% -20%, rgba(99, 102, 241, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 50%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 20% 80%, rgba(96, 165, 250, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.floating-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: rgba(99, 102, 241, 0.08);
    top: -10%;
    right: -5%;
    animation-delay: 0s;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: rgba(139, 92, 246, 0.06);
    bottom: 20%;
    left: -5%;
    animation-delay: -7s;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: rgba(96, 165, 250, 0.06);
    top: 50%;
    right: 20%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(10, 10, 15, 0.7);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: var(--text-xl);
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    font-size: var(--text-2xl);
}

.logo-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Main Content --- */
.main {
    position: relative;
    z-index: 1;
    padding-top: var(--header-height);
}

/* --- Gradient Text --- */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Footer --- */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-24);
}

.footer__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-12) var(--space-6);
    text-align: center;
}

.footer__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: var(--text-xl);
    margin-bottom: var(--space-4);
}

.footer__logo .logo-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer__note {
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
    margin-bottom: var(--space-4);
}

.footer__copy {
    color: var(--color-text-tertiary);
    font-size: var(--text-xs);
}

/* --- Utility Classes --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
}