:root {
    /* Color Palette */
    --color-primary: #0A1930;
    /* Deep Navy - Trust & Professionalism */
    --color-accent: #3498db;
    /* Bright Blue - Innovation */
    --color-text: #1d1d1f;
    /* Dark Charcoal - Readability */
    --color-text-light: #6e6e73;
    /* Grey - Subtitles */
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f7;
    /* Very light cool grey */
    --color-card-bg: #ffffff;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 32px;
    --spacing-xl: 64px;
    --spacing-xxl: 120px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

    /* Shadows */
    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 12px 24px rgba(0, 0, 0, 0.12);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", Roboto, "Noto Sans KR", sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-padding {
    padding: var(--spacing-xxl) 0;
}

.text-center {
    text-align: center;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

/* Scroll Animation Classes */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Category Tags */
.tag-project {
    background-color: #e3f2fd;
    color: #1565c0;
}

.tag-advisory {
    background-color: #f3e5f5;
    color: #7b1fa2;
}

.tag-default {
    background-color: #eee;
    color: #333;
}

.tag i {
    margin-right: 4px;
}