/* ============================================
   TK WebHosts Corporate Website - Premium Stylesheet
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Poppins:wght@400;500;600;700;800&display=swap');

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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --secondary-dark: #059669;
    --accent-color: #8b5cf6;
    --text-dark: #1f2937;
    --text-medium: #4b5563;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-gradient-primary: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    --bg-gradient-secondary: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-2xl: 0 35px 60px -15px rgba(0, 0, 0, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-dark);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
}

p {
    margin-bottom: 1rem;
    color: var(--text-medium);
    font-size: 1.0625rem;
    line-height: 1.75;
}

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

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

/* Header & Navigation */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(229, 231, 235, 0.5);
}

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

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Poppins', sans-serif;
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--bg-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 1rem;
    position: relative;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-size: 0.9375rem;
}

.nav-links a:hover {
    color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--bg-gradient-primary);
    transition: width 0.3s ease;
    border-radius: 2px;
}

.nav-links a:hover::after {
    width: 60%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: all 0.3s ease;
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.section {
    padding: 6rem 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--bg-gradient-primary);
    border-radius: 2px;
}

.section-title p {
    font-size: 1.125rem;
    color: var(--text-medium);
    max-width: 700px;
    margin: 1.5rem auto 0;
}

/* Hero Section */
.hero {
    background: var(--bg-gradient-primary);
    color: white;
    padding: 8rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-30px, -30px) rotate(180deg); }
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: white;
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 0.8s ease-out;
}

.hero p {
    color: rgba(255, 255, 255, 0.95);
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    margin-bottom: 2.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 12px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    font-size: 1rem;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    font-family: 'Inter', sans-serif;
    letter-spacing: 0.01em;
    box-shadow: var(--shadow-md);
}

.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 0.6s, height 0.6s;
}

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

.btn-primary {
    background: var(--bg-gradient-primary);
    color: white;
}

.btn-primary:hover {
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: var(--bg-gradient-secondary);
    color: white;
}

.btn-secondary:hover {
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--bg-gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--bg-gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: rgba(37, 99, 235, 0.2);
}

.service-card h3 {
    background: var(--bg-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.service-card p {
    margin-bottom: 1rem;
    color: var(--text-medium);
    line-height: 1.7;
}

.service-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    transition: transform 0.4s ease;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

/* Features Section */
.features {
    background: linear-gradient(180deg, var(--bg-light) 0%, rgba(249, 250, 251, 0.5) 100%);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
    border-radius: 16px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
}

.feature-item:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-item h3 {
    background: var(--bg-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.75rem;
    font-size: 1.375rem;
}

/* Contact Form */
.contact-form {
    max-width: 650px;
    margin: 0 auto;
    background: var(--bg-white);
    padding: 3rem;
    border-radius: 24px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient-primary);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group label .required {
    color: #dc3545;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--bg-white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 0.25rem;
    cursor: pointer;
}

.checkbox-group label {
    margin-bottom: 0;
    font-weight: normal;
    cursor: pointer;
}

.error-message {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}

.error-message.show {
    display: block;
}

.form-group.error input,
.form-group.error textarea,
.form-group.error select {
    border-color: #dc3545;
}

.success-message {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
    padding: 1.25rem 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    display: none;
    border-left: 4px solid var(--secondary-color);
    box-shadow: var(--shadow-sm);
    animation: slideIn 0.4s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.success-message.show {
    display: block;
}

/* Footer */
footer {
    background: linear-gradient(180deg, #1f2937 0%, #111827 100%);
    color: white;
    padding: 4rem 2rem 1.5rem;
    margin-top: 6rem;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: white;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.75rem;
    display: block;
    transition: all 0.3s ease;
}

.footer-section a:hover {
    color: white;
    transform: translateX(5px);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* Legal Pages */
.legal-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 2rem;
    background: var(--bg-white);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.legal-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    background: var(--bg-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.legal-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.legal-content ul,
.legal-content ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.legal-content li {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.legal-content p {
    margin-bottom: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: left 0.3s ease;
        box-shadow: var(--shadow);
        padding: 2rem 0;
        gap: 0;
    }

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

    .nav-links li {
        width: 100%;
        padding: 1rem 0;
    }

    .nav-links a {
        display: block;
        width: 100%;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 1rem;
    }

    .section {
        padding: 2rem 0;
    }
}

@media (max-width: 480px) {
    nav {
        padding: 1rem;
    }

    .hero {
        padding: 4rem 1rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .btn {
        padding: 0.625rem 1.5rem;
        font-size: 0.9rem;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .legal-content {
        padding: 1rem;
    }
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 25s ease-in-out infinite;
}

.cta-section::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 30s ease-in-out infinite reverse;
}

.cta-section .container {
    position: relative;
    z-index: 1;
}

/* Print Styles */
@media print {
    header,
    footer,
    .btn {
        display: none;
    }

    body {
        color: black;
        background: white;
    }
}