/* ===== SHARED STYLES & VARIABLES ===== */
:root {
    /* Modern Color Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --warning-gradient: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);

    /* Solid Colors */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #4facfe;
    --success-color: #11998e;
    --warning-color: #f093fb;
    --error-color: #ff6b6b;

    /* Neutral Colors */
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --text-muted: #a0aec0;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);

    /* Dark Theme */
    --dark-bg-primary: #1a202c;
    --dark-bg-secondary: #2d3748;
    --dark-bg-tertiary: #4a5568;
    --dark-text-primary: #f7fafc;
    --dark-text-secondary: #e2e8f0;
    --dark-border: #4a5568;

    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --font-code: 'JetBrains Mono', 'Fira Code', monospace;
    --font-display: 'Plus Jakarta Sans', sans-serif;

    /* Spacing Scale */
    --space-1: 0.25rem;
    /* 4px */
    --space-2: 0.5rem;
    /* 8px */
    --space-3: 0.75rem;
    /* 12px */
    --space-4: 1rem;
    /* 16px */
    --space-5: 1.25rem;
    /* 20px */
    --space-6: 1.5rem;
    /* 24px */
    --space-8: 2rem;
    /* 32px */
    --space-10: 2.5rem;
    /* 40px */
    --space-12: 3rem;
    /* 48px */
    --space-16: 4rem;
    /* 64px */
    --space-20: 5rem;
    /* 80px */
    --space-24: 6rem;
    /* 96px */
    --space-32: 8rem;
    /* 128px */

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Layout */
    --container-max-width: 1200px;
    --container-padding: var(--space-6);
    --header-height: 80px;

    /* Improved Spacing for Better Layout */
    --section-padding: var(--space-20) 0;
    --section-padding-sm: var(--space-12) 0;
    --content-max-width: 800px;
    --grid-gap: var(--space-8);
    --grid-gap-sm: var(--space-6);
    --card-padding: var(--space-8);
    --card-margin: var(--space-6);

    /* Responsive Breakpoints */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
}

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

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    line-height: 1.5;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

h5 {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
    max-width: 65ch;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-normal);
}

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

code {
    font-family: var(--font-code);
    font-size: 0.875em;
    background-color: var(--bg-tertiary);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
}

/* ===== LAYOUT COMPONENTS ===== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 3rem var(--container-padding);
}

.container-narrow {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Improved spacing classes */
.mt-0 {
    margin-top: 0;
}

.mt-4 {
    margin-top: var(--space-4);
}

.mt-8 {
    margin-top: var(--space-8);
}

.mt-12 {
    margin-top: var(--space-12);
}

.mt-16 {
    margin-top: var(--space-16);
}

.mt-20 {
    margin-top: var(--space-20);
}

.mb-0 {
    margin-bottom: 0;
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.mb-8 {
    margin-bottom: var(--space-8);
}

.mb-12 {
    margin-bottom: var(--space-12);
}

.mb-16 {
    margin-bottom: var(--space-16);
}

.mb-20 {
    margin-bottom: var(--space-20);
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.p-4 {
    padding: var(--space-4);
}

.p-6 {
    padding: var(--space-6);
}

.p-8 {
    padding: var(--space-8);
}

.px-4 {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

.px-6 {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

.py-4 {
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
}

.py-6 {
    padding-top: var(--space-6);
    padding-bottom: var(--space-6);
}

.section {
    padding: var(--space-24) 0;
    position: relative;
}

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

/* Reduced padding for skills page */
.skills-comparison,
.learning-path,
.certifications,
.tools-section,
.skills-cta {
    padding: 3rem 0 !important;
}

.section-padding-sm {
    padding: var(--section-padding-sm);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
    max-width: var(--content-max-width);
    margin-left: auto;
    margin-right: auto;
}

/* Background variations for sections */
.bg-secondary {
    background-color: var(--bg-secondary);
}

.bg-tertiary {
    background-color: var(--bg-tertiary);
}

.section-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -var(--space-2);
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-top: var(--space-4);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    height: var(--header-height);
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.98);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0 var(--container-padding);
    max-width: 100%;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    flex-shrink: 0;
}

.nav-menu {
    display: flex;
    gap: var(--space-8);
    list-style: none;
    flex-shrink: 1;
    min-width: 0;
}

.nav-link {
    position: relative;
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background-color: rgba(102, 126, 234, 0.1);
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: -var(--space-1);
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 60%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--space-2);
    gap: var(--space-1);
}

.hamburger-line {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    min-width: 140px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.6s ease;
}

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

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    color: white;
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    color: white;
    transform: translateY(-2px);
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    padding: var(--space-6);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    margin-bottom: var(--space-4);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-2);
}

.card-subtitle {
    color: var(--text-light);
    font-size: 0.875rem;
}

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

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

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

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(100%);
    }

    to {
        transform: translateY(0);
    }
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(-10px);
    }

    60% {
        transform: translateY(-5px);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

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

/* Animation Classes */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.fade-in-down {
    opacity: 0;
    transform: translateY(-30px);
    transition: all 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.visible {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1);
}

/* ===== UTILITIES ===== */
.text-center {
    text-align: center;
}

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

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

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

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

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

.justify-between {
    justify-content: space-between;
}

.gap-2 {
    gap: var(--space-2);
}

.gap-4 {
    gap: var(--space-4);
}

.gap-6 {
    gap: var(--space-6);
}

.gap-8 {
    gap: var(--space-8);
}

.grid {
    display: grid;
}

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

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

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

.w-full {
    width: 100%;
}

.h-full {
    height: 100%;
}

.min-h-screen {
    min-height: 100vh;
}

.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.fixed {
    position: fixed;
}

.hidden {
    display: none;
}

.block {
    display: block;
}

.overflow-hidden {
    overflow: hidden;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    :root {
        --container-padding: var(--space-4);
        --space-24: 4rem;
        --space-32: 5rem;
    }
}

@media (max-width: 768px) {

    /* Clamp layout to viewport to prevent horizontal scroll on small screens */
    html,
    body {
        width: 100%;
        max-width: 100vw;
        overflow-x: hidden;
    }

    .navbar,
    .nav-container,
    main,
    section,
    .page-header,
    .container {
        width: 100%;
        max-width: none;
        box-sizing: border-box;
    }

    /* Mobile off-canvas menu without causing horizontal overflow */
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        /* Let the menu fit its content to avoid forcing vertical scroll */
        height: auto;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: var(--space-6) var(--space-4);
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        box-shadow: var(--shadow-xl);
        will-change: transform;
    }

    [data-theme="dark"] .nav-menu {
        background: rgba(26, 32, 44, 0.98);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-link {
        font-size: 1.25rem;
        padding: var(--space-3);
        width: 100%;
        text-align: center;
    }

    .hamburger {
        display: flex;
    }

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

    .container {
        padding: 3rem var(--space-4);
    }

    .section {
        padding: var(--space-16) 0;
    }

    .btn {
        min-width: 120px;
        padding: var(--space-3) var(--space-5);
    }

    /* Footer responsive */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        text-align: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: var(--space-3);
        --space-16: 3rem;
        --space-20: 4rem;
        --space-24: 3rem;
    }

    .nav-container {
        padding: 0 var(--space-4);
    }

    .card {
        padding: var(--space-4);
    }

    .section-header {
        margin-bottom: var(--space-12);
    }
}

/* ===== DARK THEME ===== */
[data-theme="dark"] {
    --bg-primary: var(--dark-bg-primary);
    --bg-secondary: var(--dark-bg-secondary);
    --bg-tertiary: var(--dark-bg-tertiary);
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --border-color: var(--dark-border);
    --shadow-color: rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .navbar {
    background: rgba(26, 32, 44, 0.95);
    border-bottom-color: var(--dark-border);
}

[data-theme="dark"] .card {
    background: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

[data-theme="dark"] code {
    background-color: var(--dark-bg-tertiary);
    color: var(--dark-text-primary);
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
input:focus,
textarea:focus,
select:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--dark-bg-primary);
    color: var(--dark-text-primary);
    padding: var(--space-24) 0 var(--space-8);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-4);
}

.footer-info p {
    color: var(--dark-text-secondary);
    margin-bottom: var(--space-3);
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
}

.footer-section h4 {
    font-size: 1.125rem;
    margin-bottom: var(--space-4);
    color: var(--dark-text-primary);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--space-3);
}

.footer-section a {
    color: var(--dark-text-secondary);
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-social {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
}

.footer-social .social-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark-bg-secondary);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    color: var(--dark-text-primary);
    font-size: 1.25rem;
    transition: all var(--transition-normal);
}

.footer-social .social-icon:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-4px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--dark-border);
}

.footer-bottom p {
    color: var(--dark-text-secondary);
    margin-bottom: var(--space-2);
}

/* ===== PRINT STYLES ===== */
@media print {

    .navbar,
    .hamburger,
    .btn {
        display: none !important;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
        color: black;
        background: white;
    }

    .card {
        box-shadow: none;
        border: 1pt solid #ccc;
        break-inside: avoid;
    }

    .section {
        padding: 20pt 0;
    }
}