/* ========================================
   Gruvbox Color Palette
   ======================================== */
:root {
    /* Background colors */
    --bg-hard: #1d2021;
    --bg: #282828;
    --bg-soft: #32302f;
    --bg1: #3c3836;
    --bg2: #504945;
    --bg3: #665c54;
    --bg4: #7c6f64;

    /* Foreground colors */
    --fg: #ebdbb2;
    --fg1: #ebdbb2;
    --fg2: #d5c4a1;
    --fg3: #bdae93;
    --fg4: #a89984;

    /* Accent colors */
    --red: #fb4934;
    --green: #b8bb26;
    --yellow: #fabd2f;
    --blue: #83a598;
    --purple: #d3869b;
    --aqua: #8ec07c;
    --orange: #fe8019;

    /* Spacing */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Typography */
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;
}

/* ========================================
   Reset and Base Styles
   ======================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg);
    color: var(--fg);
    line-height: 1.6;
}

a {
    color: var(--aqua);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--yellow);
}

/* ========================================
   Navigation Bar
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-hard);
    padding: var(--spacing-md) 0;
    z-index: 1000;
    border-bottom: 1px solid var(--bg1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Terminal-style PS1 Logo */
.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: normal;
    color: var(--fg);
    display: flex;
    align-items: center;
    gap: 0;
}

.nav-logo:hover {
    color: var(--fg);
}

/* The prompt part (e.g., "~$") */
.ps1-prompt {
    color: var(--green);
}

/* The typed text part */
.ps1-text {
    color: var(--fg);
}

/* Blinking cursor */
.ps1-cursor {
    color: var(--fg);
    animation: blink 1s step-end infinite;
}

/* Cursor blink animation */
@keyframes blink {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--fg2);
    font-size: 1rem;
    padding: var(--spacing-sm);
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--aqua);
}

/* Hamburger menu button (hidden on desktop) */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--fg);
    position: relative;
    transition: background-color 0.3s ease;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 3px;
    background-color: var(--fg);
    transition: transform 0.3s ease;
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* Mobile navigation styles */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--bg-hard);
        padding: var(--spacing-md);
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-menu.active {
        max-height: 300px;
        border-bottom: 1px solid var(--bg1);
    }

    .nav-item {
        text-align: center;
        padding: var(--spacing-sm) 0;
    }
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    background-color: var(--bg);
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 4rem);
    color: var(--fg);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.5rem);
    color: var(--fg3);
    margin-bottom: var(--spacing-lg);
}

.hero-button {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--aqua);
    color: var(--bg-hard);
    font-weight: bold;
    border-radius: 4px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.hero-button:hover {
    background-color: var(--green);
    color: var(--bg-hard);
    transform: translateY(-2px);
}

/* ========================================
   About Section
   ======================================== */
.about {
    padding: var(--spacing-xl) var(--spacing-lg);
    background-color: var(--bg-soft);
}

.about-container {
    max-width: 800px;
    margin: 0 auto;
}

.section-title {
    font-size: 2rem;
    color: var(--orange);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--aqua);
    margin: var(--spacing-sm) auto 0;
}

.about-content {
    color: var(--fg2);
}

.about-content p {
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--spacing-lg);
    background-color: var(--bg-hard);
    text-align: center;
    color: var(--fg4);
    border-top: 1px solid var(--bg1);
}

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

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

.text-accent {
    color: var(--aqua);
}

/* ========================================
   Responsive Design - Tablet (768px - 1024px)
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --spacing-xl: 3rem;
    }

    .hero-content {
        max-width: 90%;
    }

    .about-container {
        max-width: 90%;
    }
}

/* ========================================
   Responsive Design - Mobile (max 768px)
   ======================================== */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2.5rem;
    }

    .hero {
        padding: calc(var(--spacing-xl) + 60px) var(--spacing-md) var(--spacing-xl);
        min-height: 100svh; /* svh = small viewport height, better for mobile browsers */
    }

    .hero-content {
        max-width: 100%;
        padding: 0 var(--spacing-sm);
    }

    .hero-button {
        padding: var(--spacing-md) var(--spacing-lg);
        width: 100%;
        max-width: 280px;
    }

    .about {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .about-container {
        max-width: 100%;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .footer {
        padding: var(--spacing-md);
    }

    .footer p {
        font-size: 0.875rem;
    }
}

/* ========================================
   Responsive Design - Small Mobile (max 480px)
   ======================================== */
@media (max-width: 480px) {
    :root {
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
        --spacing-xl: 2rem;
    }

    .nav-container {
        padding: 0 var(--spacing-md);
    }

    .nav-logo {
        font-size: 1.25rem;
    }

    .hero {
        padding-top: calc(var(--spacing-xl) + 50px);
    }

    .hero-title {
        font-size: clamp(1.5rem, 8vw, 2.5rem);
    }

    .hero-subtitle {
        font-size: clamp(0.875rem, 4vw, 1.25rem);
    }

    .hero-button {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .about-content p {
        font-size: 0.95rem;
        line-height: 1.7;
    }
}

/* ========================================
   Touch Device Enhancements
   ======================================== */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets for mobile */
    .nav-link {
        padding: var(--spacing-md);
    }

    .hero-button {
        padding: var(--spacing-md) var(--spacing-xl);
        min-height: 48px; /* Minimum recommended touch target size */
    }

    /* Remove hover effects that don't work well on touch */
    .hero-button:hover {
        transform: none;
    }
}

/* ========================================
   Landscape Mobile
   ======================================== */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: calc(60px + var(--spacing-lg)) var(--spacing-lg) var(--spacing-lg);
    }

    .hero-title {
        margin-bottom: var(--spacing-sm);
    }

    .hero-subtitle {
        margin-bottom: var(--spacing-md);
    }
}