/* ==========================================================================
   Nava.dev - Developer Portfolio & Projects Hub
   MOBILE-FIRST IMPLEMENTATION (Optimized for performance & small screens first)
   Aesthetic: Cyberpunk Dark Mode, Glassmorphic cards, Glowing Indigo & Cyan accents.
   ========================================================================== */

:root {
    /* Color Palette */
    --color-bg: #070709; /* Ultra dark obsidian */
    --color-bg-surface: #0f0f13; /* Dark glass container background */
    --color-bg-surface-elevated: #16161f; /* Card background */
    --color-text-primary: #f3f4f6; /* Off-white */
    --color-text-secondary: #9ca3af; /* Warm gray */
    --color-text-muted: #6b7280; /* Dark gray */
    
    --color-accent: #9333ea; /* Glowing Purple */
    --color-accent-glow: #c084fc; /* Electric Glowing Purple */
    --color-accent-glow-rgb: 192, 132, 252;
    
    --color-whatsapp: #25d366;
    --color-whatsapp-hover: #20ba5a;
    
    --color-border: rgba(255, 255, 255, 0.05);
    --color-border-hover: rgba(192, 132, 252, 0.15);
    
    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    --font-mono: 'Space Grotesk', monospace;
    
    /* Animations & Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-quick: all 0.2s ease;
    
    /* Layout */
    --container-max-width: 1200px;
    --header-height: 70px;
}

/* ==========================================================================
   Base Styles & Reset (Mobile Default)
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Subtle futuristic grid background */
body::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 50% 0%, rgba(147, 51, 234, 0.06) 0%, transparent 50%),
        linear-gradient(rgba(255, 255, 255, 0.005) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.005) 1px, transparent 1px);
    background-size: 100% 100%, 40px 40px, 40px 40px;
    z-index: -10;
    pointer-events: none;
}

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-quick);
}

button, input, select, textarea {
    font-family: inherit;
    color: inherit;
    background: none;
    border: none;
    outline: none;
}

/* ==========================================================================
   Typography & Headers (Mobile Default)
   ========================================================================== */

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.25;
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent-glow);
    display: inline-block;
    margin-bottom: 0.75rem;
    font-weight: 400;
}

.section-title {
    font-size: 2.25rem;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.section-desc {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto 1.5rem auto;
    font-weight: 300;
}

.section-line {
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-glow));
    margin: 0 auto;
}

/* ==========================================================================
   Buttons & CTAs
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.75rem;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-smooth);
    width: 100%; /* Stretched buttons by default on mobile */
    font-family: var(--font-heading);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), #4f46e5);
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-accent-glow);
    background-color: rgba(0, 240, 255, 0.02);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.05);
}

/* ==========================================================================
   Header & Navigation (Mobile Default: Drawer Overlay)
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(7, 7, 9, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
    transition: var(--transition-smooth);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
}

.logo-accent-char {
    color: var(--color-accent-glow);
}

/* Mobile Drawer Overlay */
.nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--color-bg);
    border-top: 1px solid var(--color-border);
    transform: translateY(-100%);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 90;
    overflow-y: auto;
    padding: 3rem 1.5rem;
}

.nav-menu.open {
    transform: translateY(0);
}

.nav-list {
    display: flex;
    flex-direction: column;
    list-style: none;
    gap: 1.75rem;
}

.nav-link {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    display: block;
    padding: 0.5rem 0;
}

.nav-link:hover {
    color: var(--color-accent-glow);
}

.btn-nav-cta {
    background-color: rgba(0, 240, 255, 0.03);
    border: 1px solid var(--color-border-hover);
    padding: 0.85rem;
    border-radius: 4px;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1rem;
}

.btn-nav-cta i {
    color: var(--color-whatsapp);
}

.btn-nav-cta:hover {
    background-color: var(--color-accent-glow);
    color: var(--color-bg);
    border-color: var(--color-accent-glow);
}

.btn-nav-cta:hover i {
    color: var(--color-bg);
}

.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 22px;
    height: 15px;
    cursor: pointer;
    z-index: 101;
}

.mobile-menu-btn .bar {
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: var(--transition-quick);
}

/* Hamburger animations */
.mobile-menu-btn.open .bar:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
}
.mobile-menu-btn.open .bar:nth-child(2) {
    opacity: 0;
}
.mobile-menu-btn.open .bar:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
}

/* ==========================================================================
   Hero Section (Mobile Default: Single Column)
   ========================================================================== */

.hero {
    padding-top: calc(var(--header-height) + 2rem);
    padding-bottom: 4rem;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    text-align: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.badge {
    background-color: rgba(0, 240, 255, 0.05);
    color: var(--color-accent-glow);
    border: 1px solid rgba(0, 240, 255, 0.12);
    padding: 0.35rem 0.85rem;
    font-size: 0.75rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
    font-family: var(--font-mono);
}

.hero-title {
    font-size: 2.75rem;
    line-height: 1.2;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, #fff 40%, var(--color-text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: 2.25rem;
    max-width: 100%;
}

.hero-ctas {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    width: 100%;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 380px;
    margin: 0 auto;
    aspect-ratio: 1.2 / 1;
    border-radius: 6px;
    overflow: hidden;
}

.hero-image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 80%;
    height: 80%;
    transform: translate(-50%, -50%);
    background-color: rgba(99, 102, 241, 0.15);
    filter: blur(60px);
    border-radius: 50%;
    z-index: 1;
    pointer-events: none;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    border-radius: 6px;
    border: 1px solid var(--color-border);
    position: relative;
    z-index: 2;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

/* ==========================================================================
   About Section (Mobile Default: Single Column)
   ========================================================================== */

.about {
    padding: 5rem 0;
    background-color: var(--color-bg-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.about-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.about-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: 2.5rem 1.75rem;
    border-radius: 6px;
    transition: var(--transition-smooth);
}

.about-card:hover {
    border-color: rgba(99, 102, 241, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 10px 35px rgba(99, 102, 241, 0.05);
}

.card-num {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-accent-glow);
    margin-bottom: 1rem;
}

.about-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.85rem;
    color: var(--color-text-primary);
}

.about-card p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-weight: 300;
}

/* ==========================================================================
   Projects Section (Mobile Default: Single Column Grid)
   ========================================================================== */

.projects-section {
    padding: 5rem 0;
}

.projects-grid {
    display: flex;
    flex-direction: column;
    gap: 2.25rem;
}

.project-card {
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    overflow: hidden;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5);
}

.project-img-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.project-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover img {
    transform: scale(1.05);
}

.project-path {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    background-color: rgba(7, 7, 9, 0.8);
    backdrop-filter: blur(6px);
    color: var(--color-accent-glow);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
    border-radius: 4px;
    border: 1px solid var(--color-border);
    letter-spacing: -0.02em;
}

.project-info {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-category {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08rem;
    color: var(--color-accent-glow);
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
}

.project-info h3 {
    font-size: 1.45rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-primary);
}

.project-info p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 300;
}

.project-techs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.project-techs span {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.7rem;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    font-family: var(--font-mono);
}

.btn-project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-primary);
    border-bottom: 1px solid var(--color-accent-glow);
    padding-bottom: 4px;
    align-self: flex-start;
    font-family: var(--font-heading);
}

.btn-project-link:hover {
    color: var(--color-accent-glow);
    transform: translateX(4px);
}

/* ==========================================================================
   Terminal Section
   ========================================================================== */

.terminal-section {
    padding: 5rem 0;
}

.terminal-window {
    background-color: #030304;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.8);
    overflow: hidden;
}

.terminal-header {
    background-color: #0c0c0f;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0.85rem 1.25rem;
    position: relative;
}

.terminal-dots {
    display: flex;
    gap: 0.4rem;
}

.terminal-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.terminal-dots .dot.red { background-color: #ef4444; }
.terminal-dots .dot.yellow { background-color: #f59e0b; }
.terminal-dots .dot.green { background-color: #10b981; }

.terminal-title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.terminal-body {
    padding: 1.5rem 1.5rem 0.5rem 1.5rem;
    height: 250px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #4ade80; /* Classic terminal green output */
    line-height: 1.6;
}

.terminal-body::-webkit-scrollbar {
    width: 6px;
}
.terminal-body::-webkit-scrollbar-thumb {
    background-color: var(--color-border);
    border-radius: 4px;
}

.terminal-line {
    margin-bottom: 0.5rem;
    white-space: pre-wrap;
    word-break: break-all;
}

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

.terminal-quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0 1.5rem 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.btn-term-cmd {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-quick);
}

.btn-term-cmd:hover {
    background-color: rgba(0, 240, 255, 0.05);
    border-color: var(--color-accent-glow);
    color: #fff;
}

.terminal-input-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.terminal-prompt {
    color: var(--color-accent);
    white-space: nowrap;
}

#terminalInput {
    background: none;
    border: none;
    color: #fff;
    width: 100%;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

/* ==========================================================================
   Footer Section (Mobile Default)
   ========================================================================== */

.footer {
    background-color: #040405;
    border-top: 1px solid var(--color-border);
    padding: 4rem 0 0 0;
}

.footer-container {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    margin-bottom: 4rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    margin-top: 1rem;
    margin-bottom: 1.5rem;
    font-weight: 300;
}

.footer-socials {
    display: flex;
    gap: 1rem;
}

.footer-socials a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.footer-socials a:hover {
    color: var(--color-accent-glow);
    border-color: var(--color-accent-glow);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
}

.footer-nav h4 {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-primary);
    margin-bottom: 1.25rem;
    font-weight: 600;
}

.footer-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-nav a {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    font-weight: 400;
}

.footer-nav a:hover {
    color: var(--color-accent-glow);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: 1.75rem 0;
}

.footer-bottom-container {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    text-align: center;
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

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

/* ==========================================================================
   Floating Widgets & Animations
   ========================================================================== */

.floating-whatsapp {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    background-color: var(--color-whatsapp);
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.25);
    z-index: 99;
}

.whatsapp-tooltip {
    display: none;
}

.fade-in {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.appear {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   TABLET RESPONSIVE ENHANCEMENTS
   ========================================================================== */

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
    
    .container {
        padding: 0 2rem;
    }
    
    .btn {
        width: auto;
    }
    
    .hero-ctas {
        flex-direction: row;
    }
    
    .about-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .projects-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .footer-container {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .footer-brand {
        flex: 1 1 50%;
    }
    
    .footer-nav {
        flex: 1 1 25%;
        text-align: right;
    }
    
    .footer-bottom-container {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

/* ==========================================================================
   DESKTOP RESPONSIVE ENHANCEMENTS
   ========================================================================== */

@media (min-width: 1024px) {
    :root {
        --header-height: 80px;
    }
    
    .mobile-menu-btn {
        display: none;
    }
    
    .nav-menu {
        position: static;
        width: auto;
        height: auto;
        background-color: transparent;
        border-top: none;
        transform: none;
        padding: 0;
        overflow-y: visible;
    }
    
    .nav-list {
        flex-direction: row;
        gap: 2.25rem;
        align-items: center;
    }
    
    .nav-link {
        font-size: 0.85rem;
        padding: 0;
    }
    
    .btn-nav-cta {
        padding: 0.55rem 1.25rem;
        font-size: 0.85rem;
    }
    
    /* Layout restorations */
    .section-title {
        font-size: 2.75rem;
    }
    
    .hero {
        padding-top: calc(var(--header-height) + 4rem);
        padding-bottom: 6rem;
    }
    
    .hero-container {
        display: flex;
        flex-direction: column;
        gap: 3rem;
        text-align: center;
        align-items: center;
    }
    
    .hero-content {
        align-items: center;
        max-width: 850px;
        margin: 0 auto;
    }
    
    .about {
        padding: 8rem 0;
    }
    
    .about-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2.5rem;
    }
    
    .projects-section {
        padding: 8rem 0;
    }
    
    .projects-grid {
        gap: 2.5rem;
    }
    
    .project-card {
        flex-direction: row; /* Horizontal list layout for wide cards */
    }
    
    .project-img-wrapper {
        width: 45%;
        aspect-ratio: auto;
        min-height: 100%;
    }
    
    .project-info {
        width: 55%;
        padding: 3rem;
    }
    
    .terminal-section {
        padding: 8rem 0;
    }
    
    .terminal-body {
        height: 320px;
        font-size: 0.9rem;
    }
    
    .footer {
        padding: 6rem 0 0 0;
    }
    
    .footer-container {
        display: grid;
        grid-template-columns: 2fr 1fr;
    }
    
    .footer-nav {
        text-align: left;
    }
    
    /* WhatsApp Floating Widget tooltips on hover */
    .whatsapp-tooltip {
        display: block;
        position: absolute;
        right: 65px;
        background-color: var(--color-bg-surface-elevated);
        border: 1px solid var(--color-border);
        color: var(--color-text-primary);
        font-size: 0.75rem;
        padding: 0.4rem 0.9rem;
        border-radius: 4px;
        white-space: nowrap;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: var(--transition-quick);
        box-shadow: 0 5px 15px rgba(0,0,0,0.4);
    }
    
    .floating-whatsapp:hover {
        transform: scale(1.1) rotate(5deg);
    }
    
    .floating-whatsapp:hover .whatsapp-tooltip {
        opacity: 1;
        visibility: visible;
    }
}