/* ===================================
   CSS Custom Properties & Variables
   =================================== */
:root {
    /* Colors - Monochrome Theme */
    --color-bg-dark: #1a1a1a;
    --color-bg-darker: #0d0d0d;
    --color-bg-surface: rgba(30, 30, 30, 0.8);
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-accent: #ffffff;
    --color-accent-hover: #e0e0e0;
    --color-accent-glow: rgba(255, 255, 255, 0.3);

    /* Typography */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    --spacing-xxl: 8rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px var(--color-accent-glow);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 600ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 800ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===================================
   Reset & Base Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 62.5%;
    /* 1rem = 10px */
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 1.6rem;
    font-weight: var(--font-weight-regular);
    line-height: 1.7;
    color: var(--color-text-secondary);
    background: var(--color-bg-darker);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(4rem, 8vw, 7rem);
    font-weight: var(--font-weight-extrabold);
}

h2 {
    font-size: clamp(3rem, 5vw, 4.5rem);
}

h3 {
    font-size: clamp(2rem, 3vw, 2.8rem);
}

p {
    margin-bottom: var(--spacing-sm);
}

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

/* ===================================
   Layout
   =================================== */
.container {
    max-width: 120rem;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 8rem;
    height: 0.4rem;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    margin: var(--spacing-sm) auto 0;
    border-radius: 2px;
}

/* ===================================
   Navigation Bar
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 15, 30, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(59, 130, 246, 0.1);
    z-index: 100;
    transition: all var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem var(--spacing-md);
}

.nav-logo {
    font-size: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.code-symbol {
    font-size: 2.4rem;
    font-weight: var(--font-weight-bold);
    color: #ff4444;
    font-family: 'Courier New', monospace;
}

.nav-logo .logo-text {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    cursor: pointer;
}

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

.nav-item .nav-link {
    font-size: 1.5rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    padding: 0.8rem 1.6rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    position: relative;
}

.nav-item .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

.nav-item .nav-link:hover {
    color: var(--color-text-primary);
}

.nav-item .nav-link:hover::after {
    width: 60%;
}

.hire-me-nav {
    background: var(--color-text-primary) !important;
    color: #0d0d0d !important;
    padding: 0.8rem 2rem !important;
    border-radius: 2rem !important;
    font-weight: var(--font-weight-semibold) !important;
}

.hire-me-nav:hover {
    background: var(--color-accent-hover) !important;
    transform: translateY(-2px);
}

.hire-me-nav::after {
    display: none !important;
}

.hire-me-nav:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger {
    width: 2.5rem;
    height: 0.3rem;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}


/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1.4rem 3.2rem;
    font-family: var(--font-family);
    font-size: 1.6rem;
    font-weight: var(--font-weight-semibold);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn.ripple::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--color-text-primary);
    color: var(--color-bg-darker);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
    font-weight: var(--font-weight-bold);
    letter-spacing: 1px;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid var(--color-text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px) scale(1.02);
    border-color: var(--color-accent-hover);
}

.btn-small {
    padding: 1rem 2rem;
    font-size: 1.4rem;
}

.btn .icon {
    transition: transform var(--transition-base);
}

.btn:hover .icon {
    transform: translateX(3px);
}

/* ===================================
   Hero Section
   =================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 8rem;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80rem;
    height: 80rem;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    width: 100%;
}

.hero-left {
    text-align: left;
}

.hero-greeting {
    font-size: 1.4rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 2px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.hero-statement {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-md);
}

.statement-line1 {
    font-size: clamp(3rem, 5vw, 4.5rem);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.statement-line2 {
    font-size: clamp(4rem, 7vw, 7rem);
    font-weight: var(--font-weight-extrabold);
    color: var(--color-text-primary);
    line-height: 1;
    letter-spacing: -2px;
}

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

.hero-profile-image {
    width: auto;
    height: 85%;

    min-width: 45rem;
    max-width: 65rem;

    object-fit: cover;
    object-position: bottom center;

    filter: grayscale(100%) contrast(1.25) brightness(0.95);
    mix-blend-mode: lighten;

    opacity: 0.98;
    transition: transform 0.6s ease, opacity 0.6s ease;
}

.hero-profile-image:hover {
    transform: scale(1.04);
}

.hero-text-content {
    max-width: 90rem;
    margin: 0 auto;
}

.hero-title {
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    color: var(--color-accent);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-md);
}

.hero-contact-info {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin: var(--spacing-md) 0;
}

.contact-info-item {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1.6rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.4rem;
    color: var(--color-text-secondary);
    font-size: 1.3rem;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
}

.contact-info-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--color-text-primary);
}

.contact-info-item svg {
    color: var(--color-text-secondary);
}

.hero-value {
    font-size: clamp(1.6rem, 2.5vw, 2rem);
    color: var(--color-text-secondary);
    max-width: 70rem;
    margin: var(--spacing-md) auto var(--spacing-lg);
    font-weight: var(--font-weight-light);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

/* ===================================
   About Section
   =================================== */
.about-section {
    background: var(--color-bg-surface);
    backdrop-filter: blur(10px);
}

.about-content {
    max-width: 80rem;
    margin: 0 auto;
    text-align: center;
    font-size: 1.8rem;
    line-height: 1.8;
}

/* ===================================
   Skills Section
   =================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(30rem, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.skill-category {
    background: var(--color-bg-surface);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(59, 130, 246, 0.1);
    transition: all var(--transition-base);
}

.skill-category:hover {
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateY(-5px);
}

.category-title {
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    font-size: 2.2rem;
}

.skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-pill {
    display: inline-block;
    padding: 0.8rem 1.6rem;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 2rem;
    font-size: 1.4rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    transition: all var(--transition-base);
    cursor: default;
}

.skill-pill:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

/* ===================================
   Projects Section
   =================================== */
.projects-section {
    background: var(--color-bg-surface);
    backdrop-filter: blur(10px);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(32rem, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.project-card {
    background: rgba(26, 26, 46, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(59, 130, 246, 0.3);
}

.project-header {
    flex: 1;
}

.project-name {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 2.2rem;
}

.project-description {
    color: var(--color-text-secondary);
    font-size: 1.5rem;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tech-tag {
    padding: 0.6rem 1.2rem;
    background: rgba(59, 130, 246, 0.15);
    border-radius: 0.6rem;
    font-size: 1.2rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-accent);
}

.project-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.btn-preview,
.btn-code {
    flex: 1;
    min-width: fit-content;
    justify-content: center;
}

/* Project Preview Modal */
.preview-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.preview-modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 140rem;
    height: 90vh;
    background: var(--color-bg-dark);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.modal-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 4rem;
    height: 4rem;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: var(--color-text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    z-index: 10;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

#preview-iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ===================================
   Why Work With Me Section
   =================================== */
.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(28rem, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.why-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-bg-surface);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(59, 130, 246, 0.1);
    transition: all var(--transition-base);
}

.why-item:hover {
    transform: translateY(-5px);
    border-color: rgba(59, 130, 246, 0.3);
}

.why-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 8rem;
    height: 8rem;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
    transition: all var(--transition-base);
}

.why-item:hover .why-icon {
    background: rgba(59, 130, 246, 0.2);
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.profile-image {
    width: clamp(8rem, 12vw, 12rem);
    height: clamp(8rem, 12vw, 12rem);
    border-radius: 50%;
    border: 4px solid var(--color-accent);
    box-shadow: 0 0 30px var(--color-accent-glow);
    object-fit: cover;
    transition: all var(--transition-base);
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 0 40px var(--color-accent-glow);
}

.why-item h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.why-item p {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===================================
   Contact Section
   =================================== */
.contact-section {
    background: var(--color-bg-surface);
    backdrop-filter: blur(10px);
    text-align: center;
}

.contact-subtitle {
    font-size: 1.8rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.social-links {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 6rem;
    height: 6rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-text-primary);
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.2);
}

.whatsapp-link:hover {
    background: rgba(37, 211, 102, 0.2);
    border-color: #25d366;
    color: #25d366;
    box-shadow: 0 8px 20px rgba(37, 211, 102, 0.3);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid rgba(59, 130, 246, 0.1);
}

.footer p {
    color: var(--color-text-secondary);
    font-size: 1.4rem;
}

/* ===================================
   Animations
   =================================== */
@keyframes float {

    0%,
    100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(-20px, -20px);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

.animate-fade-in:nth-child(1) {
    animation-delay: 0.1s;
}

.animate-fade-in:nth-child(2) {
    animation-delay: 0.2s;
}

.animate-fade-in:nth-child(3) {
    animation-delay: 0.3s;
}

.animate-fade-in:nth-child(4) {
    animation-delay: 0.4s;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animations for why-items */
.why-item.animate-on-scroll:nth-child(1) {
    transition-delay: 0.1s;
}

.why-item.animate-on-scroll:nth-child(2) {
    transition-delay: 0.2s;
}

.why-item.animate-on-scroll:nth-child(3) {
    transition-delay: 0.3s;
}

.why-item.animate-on-scroll:nth-child(4) {
    transition-delay: 0.4s;
}

.why-item.animate-on-scroll:nth-child(5) {
    transition-delay: 0.5s;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    html {
        font-size: 56.25%;
        /* 1rem = 9px */
    }

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

    section {
        padding: var(--spacing-xl) 0;
    }

    /* Mobile Navigation */
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 6.5rem;
        left: -100%;
        width: 100%;
        flex-direction: column;
        background: rgba(15, 15, 30, 0.98);
        backdrop-filter: blur(10px);
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        transition: left var(--transition-base);
        border-bottom: 1px solid rgba(59, 130, 246, 0.1);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: 1.2rem;
    }

    .hire-me-nav {
        margin-top: var(--spacing-sm);
    }

    .hero-section {
        min-height: auto;
        padding: var(--spacing-xl) 0;
        padding-top: 8rem;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

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

    .hero-right {
        justify-content: center;
        order: -1;
    }

    .hero-profile-image {
        max-width: 35rem;
    }

    .hero-contact-info {
        justify-content: center;
        flex-direction: column;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-contact-info {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

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

    .btn {
        width: 100%;
        max-width: 30rem;
        justify-content: center;
    }

    .skills-grid,
    .projects-grid,
    .why-grid {
        grid-template-columns: 1fr;
    }

    .project-actions {
        flex-direction: column;
    }

    .contact-grid {
        flex-direction: column;
        align-items: center;
    }

    .contact-btn {
        width: 100%;
        max-width: 30rem;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 50%;
        /* 1rem = 8px */
    }

    .modal-content {
        height: 100vh;
        border-radius: 0;
    }
}

/* ===================================
   Print Styles
   =================================== */
@media print {
    .hero-section::before {
        display: none;
    }

    .btn {
        border: 1px solid var(--color-accent);
    }
}