:root {
    --bg-color: #F7F7F5;
    --card-bg: #FFFFFF;
    --text-primary: #111111;
    --text-secondary: #666666;
    --border-color: #E8E8E8;
    --card-radius: 20px;
    --nav-height: 80px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.5;
}

/* Navigation */
.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    height: var(--nav-height);
    position: sticky;
    top: 0;
    background: rgba(247, 247, 245, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
}

.nav-left, .nav-right {
    display: flex;
    align-items: center;
    gap: 24px;
    flex: 1;
}

.nav-right {
    justify-content: flex-end;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.search-bar {
    display: flex;
    align-items: center;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 100px;
    padding: 0 16px;
    width: 100%;
    max-width: 500px;
    height: 44px;
    transition: box-shadow 0.2s, border-color 0.2s;
}

.search-bar:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    border-color: #ddd;
}

.search-bar svg {
    color: var(--text-secondary);
}

.search-bar input {
    border: none;
    outline: none;
    background: transparent;
    padding: 0 12px;
    width: 100%;
    font-family: inherit;
    font-size: 14px;
    color: var(--text-primary);
}

.search-bar input::placeholder {
    color: #999;
}

.search-icons {
    display: flex;
    align-items: center;
    color: #ccc;
}

.login-btn, .signup-btn {
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 100px;
    transition: all 0.2s;
}

.login-btn {
    color: var(--text-primary);
}

.login-btn:hover {
    color: #000;
}

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

.signup-btn:hover {
    background: #000;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Hero */
.hero {
    text-align: center;
    padding: 80px 20px 60px;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 500;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Resume Layout (2-column CSS Grid) */
.resume-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 32px;
    padding: 0 32px 64px;
    max-width: 1400px;
    margin: 0 auto;
    align-items: start;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.section-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

@media (max-width: 1024px) {
    .resume-layout { 
        grid-template-columns: 300px 1fr; 
    }
}

@media (max-width: 800px) {
    .resume-layout { 
        grid-template-columns: 1fr; 
        padding: 0 16px 64px;
    }
    .sidebar {
        position: static;
    }
    .nav-left .nav-links, .nav-right .login-btn {
        display: none;
    }
}

/* Cards */
.card {
    break-inside: avoid;
    margin-bottom: 24px;
    border-radius: var(--card-radius);
    overflow: hidden;
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.02);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    transform: translateZ(0);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.06);
    border-color: transparent;
}

.card-small { min-height: 200px; }
.card-medium { min-height: 280px; }
.card-large { min-height: 380px; }

.card-content {
    padding: 32px;
}

.card h2 {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.desc {
    color: var(--text-secondary);
    font-size: 15px;
    margin-top: 16px;
}

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

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.huge-text {
    font-size: 120px;
    font-weight: 700;
    letter-spacing: -0.05em;
    line-height: 1;
    margin-bottom: -10px;
    color: var(--text-primary);
}

/* UI Elements inside cards */
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.ptag {
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 14px;
    transition: all 0.2s;
    background: #F9F9F9;
}

.ptag:hover {
    border-color: var(--text-primary);
    background: var(--text-primary);
    color: white;
}

.task-list {
    list-style: none;
    margin-top: 20px;
}

.task-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 12px;
    font-size: 15px;
    color: var(--text-secondary);
}

.task-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: inherit;
    font-weight: bold;
}

.date-badge {
    display: inline-block;
    padding: 6px 12px;
    background: #F4F4F4;
    color: var(--text-primary);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}

.hashtag {
    margin-top: 24px;
    display: inline-flex;
    align-items: center;
    background: rgba(0,0,0,0.03);
    padding: 8px 16px;
    border-radius: 100px;
    font-weight: 500;
    font-size: 16px;
    letter-spacing: 0.02em;
    color: var(--text-primary);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: #111;
    color: #fff;
    padding: 14px 28px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 500;
    box-shadow: 0 12px 32px rgba(0,0,0,0.2);
    transition: bottom 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
}

.toast.show {
    bottom: 48px;
}