/* ==================== UNIVERSAL STYLES FOR ALL PAGES ==================== */

/* ==================== FONTS ==================== */
@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Inter:wght@400;500;600&family=Lora:ital,wght@0,400;0,500;1,400&family=Courier+Prime:wght@400&display=swap');

/* ==================== CSS VARIABLES (COLORS) ==================== */
:root {
    /* Main Colors */
    --deep-indigo: #141d44;
    --primary-blue: #1a3a52;
    --sky-blue: #4a90c8;
    --powder-blue: #a8b8c8;
    --silver: #c0c5ca;
    
    /* Neutrals */
    --white: #ffffff;
    --soft-white: #f5f5f5;
    --light-gray: #e5e7eb;
    --charcoal: #2a2a2a;
    --medium-gray: #666666;
    --light-text: #999999;
    
    /* Status Colors */
    --success: #10b981;
    --error: #ef4444;
}

/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Lora', serif;
    font-size: 17px;
    line-height: 1.7;
    color: var(--charcoal);
    background: var(--white);
    min-height: 100vh;
    font-weight: 400;
}

/* Dark theme body (for pages like portfolio) */
body.dark-theme {
    font-family: 'Courier New', Courier, monospace;
    font-size: 18px;
    line-height: 1.5;
    color: var(--white);
    background: var(--deep-indigo);
    padding: 40px;
}

/* ==================== CONTAINER ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.container-narrow {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 40px;
}

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ==================== NAVIGATION ==================== */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--silver);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
}

/* Dark nav for dark theme pages */
body.dark-theme nav {
    background: var(--deep-indigo);
    border-bottom: 2px solid var(--white);
}

nav.scrolled {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

body.dark-theme nav.scrolled {
    background: var(--deep-indigo);
}

nav .container {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav .logo {
    font-family: 'Space Mono', monospace;
    font-size: 20px;
    font-weight: 400;
    color: var(--primary-blue);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

body.dark-theme nav .logo {
    font-family: 'Courier New', Courier, monospace;
    font-weight: 700;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

nav .logo:hover {
    opacity: 0.7;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 32px;
    margin: 0;
    padding: 0;
}

nav a {
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 500;
    color: var(--charcoal);
    text-decoration: none;
    transition: color 0.3s ease;
    border-bottom: 2px solid transparent;
    padding-bottom: 2px;
}

body.dark-theme nav a {
    font-family: 'Courier New', Courier, monospace;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: -0.01em;
}

nav a:hover {
    color: var(--sky-blue);
}

body.dark-theme nav a:hover {
    color: var(--white);
}

nav a.active {
    color: var(--sky-blue);
    border-bottom-color: var(--sky-blue);
}

body.dark-theme nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--white);
}

/* ==================== TYPOGRAPHY - LIGHT THEME ==================== */
h1 {
    font-family: 'Space Mono', monospace;
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-blue);
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    line-height: 1.1;
}

h2 {
    font-family: 'Space Mono', monospace;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-blue);
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

h3 {
    font-family: 'Inter', sans-serif;
    font-size: 28px;
    font-weight: 600;
    color: var(--charcoal);
    margin-bottom: 16px;
}

h4 {
    font-family: 'Inter', sans-serif;
    font-size: 24px;
    font-weight: 500;
    color: var(--charcoal);
    margin-bottom: 12px;
}

h5 {
    font-family: 'Inter', sans-serif;
    font-size: 20px;
    font-weight: 500;
    color: var(--charcoal);
}

h6 {
    font-family: 'Inter', sans-serif;
    font-size: 18px;
    font-weight: 500;
    color: var(--charcoal);
}

/* ==================== TYPOGRAPHY - DARK THEME ==================== */
body.dark-theme h1 {
    font-family: 'Courier New', Courier, monospace;
    font-size: 72px;
    font-weight: normal;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    line-height: 1.1;
    margin-bottom: 0;
    color: var(--white);
}

body.dark-theme h2 {
    font-family: 'Courier New', Courier, monospace;
    font-size: 32px;
    font-weight: normal;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    line-height: 1.2;
    margin-bottom: 16px;
    margin-top: 64px;
    color: var(--white);
}

body.dark-theme h3 {
    font-family: 'Courier New', Courier, monospace;
    font-size: 24px;
    font-weight: normal;
    letter-spacing: 0.01em;
    text-transform: uppercase;
    line-height: 1.4;
    margin-bottom: 24px;
    margin-top: 48px;
    color: var(--white);
}

body.dark-theme h4 {
    font-family: 'Courier New', Courier, monospace;
    font-size: 20px;
    font-weight: normal;
    line-height: 1.4;
    margin-bottom: 16px;
    color: var(--white);
}

/* ==================== PARAGRAPHS ==================== */
p {
    font-family: 'Lora', serif;
    font-size: 17px;
    line-height: 1.7;
    color: var(--charcoal);
    margin-bottom: 24px;
}

body.dark-theme p {
    font-family: 'Courier New', Courier, monospace;
    font-size: 18px;
    line-height: 1.5;
    color: var(--white);
}

/* ==================== LINKS ==================== */
a {
    color: var(--sky-blue);
    text-decoration: none;
    border-bottom: 1px solid var(--sky-blue);
    padding-bottom: 2px;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--primary-blue);
    border-bottom-color: var(--primary-blue);
}

body.dark-theme a {
    color: var(--white);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
    border: none;
}

body.dark-theme a:hover {
    opacity: 0.7;
}

/* ==================== HEADER / HERO ==================== */
header {
    margin-top: 72px;
    padding: 96px 0 64px;
    text-align: center;
    border-bottom: 1px solid var(--silver);
}

body.dark-theme header {
    margin-top: 0;
    padding: 0;
    border-bottom: none;
}

/* Special classes for main page */
h1.big {
    font-size: 48px;
}

h3.small {
    font-family: 'Lora', serif;
    font-size: 20px;
    font-weight: 400;
    color: var(--charcoal);
    line-height: 1.7;
    max-width: 720px;
    margin: 24px auto;
}

header p {
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    color: var(--sky-blue);
    font-weight: 500;
    margin-top: 16px;
}

body.dark-theme header p {
    font-family: 'Courier New', Courier, monospace;
    font-size: 18px;
    color: var(--white);
}

/* ==================== SECTIONS ==================== */
section {
    max-width: 720px;
    margin: 64px auto;
    padding: 0;
}

section:first-of-type {
    margin-top: 96px;
}

body.dark-theme section {
    max-width: 100%;
    margin: 0;
}

/* Week sections for portfolio */
.week-section {
    margin-bottom: 96px;
}

.week-description {
    margin-bottom: 32px;
    opacity: 0.9;
}

.chart-section {
    margin-bottom: 64px;
}

/* ==================== CHART DESCRIPTIONS ==================== */
.chart-description {
    text-align: center;
    margin-bottom: 32px;
}

body.dark-theme .chart-description {
    text-align: left;
    margin-bottom: 24px;
}

.chart-description h2 {
    margin-bottom: 16px;
}

.chart-description p {
    font-size: 17px;
    line-height: 1.7;
    color: var(--charcoal);
    max-width: 650px;
    margin: 0 auto 24px;
}

body.dark-theme .chart-description p {
    max-width: 100%;
    margin: 0 0 24px 0;
}

/* ==================== FIGURES / CHARTS ==================== */
figure {
    margin: 48px auto;
    padding: 24px;
    background: var(--white);
    border: 1px solid var(--silver);
    transition: all 0.3s ease;
}

figure:hover {
    border-color: var(--powder-blue);
    box-shadow: 0 8px 16px rgba(26, 58, 82, 0.08);
}

body.dark-theme figure {
    background: rgba(255, 255, 255, 0.05);
    margin: 0 0 32px 0;
}

#chartGrid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    margin: 48px 0;
}

/* ==================== ACCENT ELEMENTS ==================== */
.accent-bar {
    height: 1px;
    width: 80px;
    background: var(--primary-blue);
    margin: 24px auto;
}

.terminal-line {
    font-family: 'Courier Prime', monospace;
    font-size: 15px;
    color: var(--primary-blue);
    background: var(--soft-white);
    padding: 8px 12px;
    margin: 24px auto;
    text-align: center;
    max-width: 600px;
}

.terminal-line::before {
    content: '→ ';
    color: var(--sky-blue);
}

/* ==================== BUTTON GRID ==================== */
.button-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin: 48px auto;
    max-width: 720px;
}

.nav-button {
    background: var(--white);
    border: 1px solid var(--silver);
    padding: 48px 32px;
    text-align: center;
    transition: all 0.3s ease;
    display: block;
    text-decoration: none;
    border-bottom: 1px solid var(--silver);
}

.nav-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(26, 58, 82, 0.08);
    border-color: var(--powder-blue);
    border-bottom: 1px solid var(--powder-blue);
}

.button-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: block;
}

.button-title {
    font-family: 'Inter', sans-serif;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 12px;
}

.button-desc {
    font-family: 'Lora', serif;
    font-size: 15px;
    color: var(--charcoal);
    line-height: 1.7;
}

/* ==================== TECH STACK BADGES ==================== */
.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 32px;
    justify-content: center;
}

.tech-badge {
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    font-weight: 500;
    color: var(--primary-blue);
    background: transparent;
    border: 1px solid var(--silver);
    padding: 8px 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.25s ease;
}

.tech-badge:hover {
    border-color: var(--sky-blue);
    color: var(--sky-blue);
}

/* ==================== DIVIDERS ==================== */
.divider {
    height: 1px;
    background: var(--silver);
    margin: 64px auto;
    width: 100%;
}

.divider-subtle {
    height: 1px;
    background: var(--light-gray);
    margin: 32px auto;
    width: 60%;
}

body.dark-theme .divider {
    height: 2px;
    background: var(--white);
    margin: 64px auto;
    max-width: 200px;
    opacity: 0.5;
}

/* ==================== FOOTER ==================== */
footer {
    max-width: 720px;
    margin: 96px auto 0;
    padding: 48px 0;
    border-top: 1px solid var(--silver);
    text-align: center;
}

body.dark-theme footer {
    max-width: 100%;
    padding: 48px 0;
    border-top: 2px solid var(--white);
}

footer p {
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    color: var(--medium-gray);
    margin: 0;
}

body.dark-theme footer p {
    font-family: 'Courier New', Courier, monospace;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==================== STATUS INDICATORS ==================== */
.status-up {
    color: var(--success);
}

.status-down {
    color: var(--error);
}

.status-neutral {
    color: var(--sky-blue);
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeIn {
    from {
        opacity: 0.9;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

body:not(.dark-theme) section {
    animation: fadeIn 0.6s ease-out;
}

/* ==================== ACCESSIBILITY ==================== */
*:focus {
    outline: 2px solid var(--sky-blue);
    outline-offset: 2px;
}

/* ==================== SCROLLBAR ==================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--soft-white);
}

::-webkit-scrollbar-thumb {
    background: var(--silver);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--powder-blue);
}

body.dark-theme::-webkit-scrollbar-track {
    background: var(--deep-indigo);
}

body.dark-theme::-webkit-scrollbar-thumb {
    background: var(--sky-blue);
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 1023px) {
    .container {
        padding: 0 32px;
    }
    
    h1, h1.big {
        font-size: 36px;
    }
    
    body.dark-theme h1 {
        font-size: 56px;
    }
    
    h2 {
        font-size: 28px;
    }
    
    .button-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    .container {
        padding: 0 20px;
    }
    
    body.dark-theme {
        padding: 20px;
        font-size: 16px;
    }
    
    nav ul {
        gap: 20px;
    }
    
    nav a {
        font-size: 14px;
    }
    
    header {
        padding: 64px 0 48px;
    }
    
    h1, h1.big {
        font-size: 32px;
    }
    
    body.dark-theme h1 {
        font-size: 40px;
    }
    
    h3.small {
        font-size: 18px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    body.dark-theme h2 {
        font-size: 24px;
        margin-top: 48px;
    }
    
    body.dark-theme h3 {
        font-size: 20px;
        margin-top: 32px;
    }
    
    body.dark-theme h4 {
        font-size: 18px;
    }
    
    section {
        margin: 48px auto;
    }
    
    .week-section {
        margin-bottom: 64px;
    }
    
    .button-grid {
        gap: 16px;
    }
    
    .nav-button {
        padding: 32px 24px;
    }
}