:root {
    /* Color Palette - Neutral Grays & Sky Blue Accent */
    --color-bg-base: #f7f7f8;
    --color-bg-surface: #ffffff;
    --color-bg-surface-hover: #f9fafb;

    --color-text-primary: #1a1a1c;
    --color-text-secondary: #6b6b70;
    --color-text-tertiary: #9e9ea3;

    --color-accent-blue: #007aff;
    /* Apple-like Sky Blue */
    --color-accent-blue-hover: #0062cc;
    --color-accent-blue-subtle: #e5f1ff;

    --color-border-subtle: #e5e5ea;
    --color-border-focus: #007aff;

    /* Spacing & Layout */
    --spacing-unit: 4px;
    --container-width: 1080px;
    --header-height: 60px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;

    /* Typography */
    --font-stack-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    --font-size-base: 16px;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 600;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: var(--font-stack-system);
    background-color: var(--color-bg-base);
    color: var(--color-text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.main-content {
    padding-top: calc(var(--header-height) + 40px);
    padding-bottom: 80px;
    min-height: 80vh;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-subtle);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.header-content {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-weight: var(--font-weight-bold);
    font-size: 1.1rem;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

/* Typography Utilities */
h1,
h2,
h3 {
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 16px;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}

p {
    color: var(--color-text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 999px;
    /* Pill shape */
    font-weight: var(--font-weight-medium);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background-color: #000;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--color-accent-blue-subtle);
    color: var(--color-accent-blue);
}

.btn-secondary:hover {
    background-color: #d0e6ff;
}

/* Cards & Grid */
.bank-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

/* Make the grid more interesting (Bento-ish) */
.bank-grid>.card:nth-child(1) {
    grid-column: span 2;
}

@media (max-width: 768px) {
    .bank-grid>.card:nth-child(1) {
        grid-column: span 1;
    }
}

.card {
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 180px;
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent-blue);
}

.bank-info {
    margin-bottom: 20px;
}

.bank-code {
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    background: var(--color-bg-base);
    padding: 4px 8px;
    border-radius: 4px;
}

/* Footer */
footer p {
    color: var(--color-text-tertiary);
}