/*
Theme Name: Tsubasa Theme
Theme URI: https://example.com/tsubasa-theme
Author: Your Name
Author URI: https://example.com
Description: A lightweight, fast single-page business theme inspired by Tsubasa Technologies. No builders, no Gutenberg - pure coded performance.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: tsubasa-theme
Tags: one-page, business, portfolio, custom-menu, custom-logo
*/

/* ========================================
   CSS Variables & Reset
======================================== */
:root {
    --color-bg-dark: #ffffff;
    --color-bg-section: #f8fafa;
    --color-bg-card: #ffffff;
    --color-primary: #00B894;
    --color-primary-light: #00D9A5;
    --color-accent: #0891b2;
    --color-text: #475569;
    --color-text-muted: #64748b;
    --color-text-heading: #1a1a2e;
    --color-border: #e2e8f0;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --max-width: 1200px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ========================================
   Typography
======================================== */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-heading);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
}

h3 {
    font-size: 1.35rem;
}

p {
    margin-bottom: 1rem;
}

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

section {
    padding: 6rem 0;
}

.section-divider {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
    margin: 0;
}

/* ========================================
   Header & Navigation
======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.site-logo img {
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
}

.site-logo .custom-logo {
    height: 50px;
    width: auto;
    max-width: 200px;
}

.site-logo .custom-logo-link {
    display: flex;
    align-items: center;
}

.site-logo .custom-logo-link img {
    height: 50px;
    width: auto;
    max-width: 200px;
}

.site-logo span {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-heading);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.main-nav a {
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-text-heading);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

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

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Hero Section
======================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    background: var(--color-bg-dark);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(0, 184, 148, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(8, 145, 178, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--color-text-heading) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    max-width: 540px;
}

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

.hero-image img,
.hero-image svg {
    max-width: 450px;
    width: 100%;
}

/* ========================================
   Services Section
======================================== */
.services-section {
    background: var(--color-bg-section);
}

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

.section-header p {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: 0 10px 40px rgba(0, 184, 148, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon img,
.service-icon svg {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.service-card h3 {
    margin-bottom: 0.75rem;
}

.service-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* ========================================
   Work Section
======================================== */
.work-section {
    background: var(--color-bg-dark);
}

.work-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.work-content h2 {
    margin-bottom: 1.5rem;
}

.work-list {
    list-style: none;
}

.work-list li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 1.5rem;
    color: var(--color-text-muted);
}

.work-list li::before {
    content: '✔';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

.work-list li strong {
    color: var(--color-text-heading);
    display: block;
    margin-bottom: 0.25rem;
}

.work-image {
    display: flex;
    justify-content: center;
}

.work-image img,
.work-image svg {
    max-width: 400px;
    width: 100%;
}

/* ========================================
   About Section
======================================== */
.about-section {
    background: var(--color-bg-section);
}

.about-inner {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    display: flex;
    justify-content: center;
}

.about-image img,
.about-image svg {
    max-width: 350px;
    width: 100%;
}

.about-content h2 {
    margin-bottom: 1.5rem;
}

.about-content p {
    color: var(--color-text-muted);
    font-size: 1.05rem;
}

/* ========================================
   Contact Section
======================================== */
.contact-section {
    background: var(--color-bg-dark);
}

.contact-inner {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.contact-content h2 {
    margin-bottom: 1rem;
}

.contact-content p {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

.email-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    color: var(--color-primary-light);
    font-weight: 500;
    padding: 1rem 0;
    cursor: pointer;
    border: none;
    background: none;
}

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

.copy-feedback {
    font-size: 0.875rem;
    color: var(--color-accent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.copy-feedback.show {
    opacity: 1;
}

.contact-image {
    display: flex;
    justify-content: center;
}

.contact-image img,
.contact-image svg {
    max-width: 350px;
    width: 100%;
}

/* ========================================
   Footer
======================================== */
.site-footer {
    background: var(--color-bg-section);
    border-top: 1px solid var(--color-border);
    padding: 2rem 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--color-text-heading);
}

/* ========================================
   Responsive Design
======================================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-inner,
    .work-inner,
    .about-inner,
    .contact-inner {
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 4rem 0;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        border-bottom: 1px solid var(--color-border);
        padding: 1rem 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: 0;
    }
    
    .main-nav li {
        width: 100%;
        text-align: center;
    }
    
    .main-nav a {
        display: block;
        padding: 1rem;
    }
    
    .hero-inner,
    .work-inner,
    .about-inner,
    .contact-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content p {
        margin: 0 auto 2rem;
    }
    
    .hero-image,
    .work-image,
    .about-image,
    .contact-image {
        order: -1;
    }
    
    .work-list li {
        text-align: left;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .email-link {
        font-size: 1rem;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}