/* 
   Design System Inspired by Eki Zulfar Rachman Portfolio
   Colors, Typography, and Components
*/

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');

:root {
    /* Colors */
    --blue-primary: #60A5FA;
    --indigo-primary: #6366F1;
    --purple-accent: #A855F7;
    --purple-light: #C084FC;
    --purple-extra-light: #E2D3FD;
    --gray-secondary: #9CA3AF;
    --slate-secondary: #94A3B8;
    --black: #000000;
    --white: #FFFFFF;
    --light-gray: #E5E7EB;
    --medium-gray: #D1D5DB;
    --slate-gray: #CBD5E1;
    --dark-gray: #4F4F4F;
    --charcoal: #333333;
    --surface-glass: rgba(255, 255, 255, 0.1);
    --border-subtle: rgba(255, 255, 255, 0.2);
    --dark-bg: #0A0E27;
    --accent-glass: rgba(139, 92, 246, 0.2);
    --error: #FF0000;

    /* Spacing */
    --unit: 4px;
    --space-tight: 4px;
    --space-compact: 8px;
    --space-button: 12px;
    --space-card: 16px;
    --space-content: 20px;
    --space-padding: 24px;
    --space-margin: 32px;
    --space-large: 40px;
    --space-generous: 48px;
    --space-hero: 56px;
    --space-section: 64px;

    /* Shadows */
    --shadow-sm: rgba(0, 0, 0, 0.1) 0px 10px 15px -3px, rgba(0, 0, 0, 0.1) 0px 4px 6px -4px;
    --shadow-md: rgba(139, 92, 246, 0.2) 0px 4px 15px -3px;
    --shadow-lg: rgba(0, 0, 0, 0.25) 0px 25px 50px -12px;
    --shadow-xl: rgba(120, 119, 198, 0.3) 0px 0px 40px 0px;
    --shadow-glow: rgba(96, 165, 250, 0.4) 0px 0px 30px 0px;
}

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

body {
    background-color: var(--dark-bg);
    color: var(--white);
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 48px; font-weight: 700; margin-bottom: var(--space-content); }
h2 { font-size: 36px; margin-bottom: var(--space-content); }
h3 { font-size: 20px; font-weight: 600; margin-bottom: var(--space-card); }
h4 { font-size: 16px; font-weight: 500; }

p { font-size: 16px; margin-bottom: var(--space-card); color: var(--slate-gray); }

a {
    color: var(--blue-primary);
    text-decoration: none;
    transition: all 200ms ease-in-out;
}

a:hover {
    color: var(--purple-light);
}

/* Layout Containers */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--space-generous) var(--space-padding);
}

@media (max-width: 1023px) {
    .container { padding: var(--space-margin) var(--space-padding); }
    h1 { font-size: 36px; }
    h2 { font-size: 28px; }
}

@media (max-width: 639px) {
    .container { padding: var(--space-margin) var(--space-card); }
    h1 { font-size: 28px; }
    h2 { font-size: 24px; }
}

section {
    padding: var(--space-section) 0;
}

@media (max-width: 1023px) { section { padding: var(--space-generous) 0; } }
@media (max-width: 639px) { section { padding: var(--space-margin) 0; } }

/* Navigation */
.navbar {
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(10px);
    height: 64px;
    width: 100%;
    padding: 0 var(--space-padding);
    display: flex;
    align-items: center;
    justify-content: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-subtle);
}

.nav-links {
    display: flex;
    gap: var(--space-compact);
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--white);
    padding: 8px 12px;
    border-radius: 6px;
}

.nav-link:hover {
    background: rgba(96, 165, 250, 0.1);
    color: var(--blue-primary);
}

.nav-link.active {
    color: var(--blue-primary);
    border-bottom: 2px solid var(--blue-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--blue-primary);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: #3B82F6;
    box-shadow: rgba(96, 165, 250, 0.5) 0px 8px 20px -3px;
    color: var(--white);
}

.btn-secondary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--indigo-primary);
    border: 1px solid var(--indigo-primary);
}

.btn-secondary:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: #4F46E5;
    color: var(--indigo-primary);
}

.icon-btn {
    width: 62px;
    height: 62px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-subtle);
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    transition: all 0.3s ease;
}

.icon-btn:hover {
    background: rgba(0, 0, 0, 0.5);
    box-shadow: rgba(160, 79, 247, 0.5) 0px 0px 50px 0px;
}

.icon-btn img {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

/* Cards */
.card {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: var(--space-padding);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.card:hover {
    border: 1px solid rgba(96, 165, 250, 0.3);
    box-shadow: rgba(96, 165, 250, 0.2) 0px 20px 25px -5px;
}

.card img {
    width: 100%;
    border-radius: 8px;
    margin-bottom: var(--space-card);
}

/* Grids */
.grid {
    display: grid;
    gap: var(--space-content);
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1023px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 639px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* Forms */
.form-group {
    margin-bottom: var(--space-card);
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: var(--space-compact);
    color: var(--white);
}

.form-input {
    width: 100%;
    height: 58px;
    background: var(--surface-glass);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 16px;
    color: var(--white);
    font-family: inherit;
    transition: all 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: rgba(96, 165, 250, 0.5);
    box-shadow: rgba(96, 165, 250, 0.2) 0px 0px 12px 0px;
}

textarea.form-input {
    height: 158px;
    resize: vertical;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--space-hero) 0;
}

.hero-profile-img {
    width: 120px;
    height: 120px;
    border-radius: 9999px;
    object-fit: cover;
    border: 2px solid var(--blue-primary);
    box-shadow: var(--shadow-glow);
    margin-bottom: var(--space-padding);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--space-padding);
    margin-top: var(--space-margin);
}

/* Utilities */
.text-center { text-align: center; }
.mb-generous { margin-bottom: var(--space-generous); }
.glow-text {
    text-shadow: 0 0 10px rgba(96, 165, 250, 0.5);
}

/* Custom Table Style for Project */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-padding) 0;
    background: var(--surface-glass);
    border-radius: 12px;
    overflow: hidden;
}

th, td {
    padding: var(--space-card);
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
}

th {
    background: rgba(255, 255, 255, 0.05);
    font-weight: 600;
}