/* ============================================
   CQI365 Landing Page Styles
   Continuous Quality Improvement, 365 Days
   ============================================ */

/* CSS Variables - Design Tokens */
:root {
    /* Primary Colors - Medical/Professional Blue */
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    --color-primary-300: #93c5fd;
    --color-primary-400: #60a5fa;
    --color-primary-500: #3b82f6;
    --color-primary-600: #2563eb;
    --color-primary-700: #1d4ed8;
    --color-primary-800: #1e40af;
    --color-primary-900: #1e3a8a;

    /* Accent Colors - Teal for healthcare */
    --color-accent-400: #2dd4bf;
    --color-accent-500: #14b8a6;
    --color-accent-600: #0d9488;

    /* Neutral Colors */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Semantic Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans TC', sans-serif;
    --font-mono: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

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

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* Reset & Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: #fff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-100);
    transition: var(--transition-base);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary-600), var(--color-accent-500));
    color: white;
    border-radius: var(--radius-lg);
    font-weight: 800;
    font-size: 1.25rem;
}

.logo-text {
    color: var(--color-gray-900);
}

.logo-accent {
    color: var(--color-primary-600);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-links a {
    font-weight: 500;
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-primary-600);
}

.nav-cta {
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary-600);
    color: white !important;
    border-radius: var(--radius-lg);
    font-weight: 600;
}

.nav-cta:hover {
    background: var(--color-primary-700);
    color: white !important;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: white;
        border-bottom: 1px solid var(--color-gray-100);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-base);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: var(--space-4) var(--space-6);
        border-bottom: 1px solid var(--color-gray-100);
    }

    .nav-cta {
        border-radius: 0;
        text-align: center;
    }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-24) 0 var(--space-16);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
        var(--color-primary-50) 0%,
        white 50%,
        var(--color-accent-400) 100%
    );
    opacity: 0.4;
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(var(--color-primary-200) 1px, transparent 1px);
    background-size: 30px 30px;
    opacity: 0.5;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    margin-bottom: var(--space-6);
}

.title-main {
    display: block;
    font-size: clamp(3rem, 8vw, 4.5rem);
    font-weight: 800;
    color: var(--color-gray-900);
    line-height: 1.1;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--color-primary-700), var(--color-accent-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-sub {
    display: block;
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    font-weight: 500;
    color: var(--color-gray-500);
    margin-top: var(--space-2);
    letter-spacing: 0.05em;
}

.hero-tagline {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: var(--space-4);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-8);
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-700));
    color: white;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: white;
    color: var(--color-gray-700);
    border: 2px solid var(--color-gray-200);
}

.btn-secondary:hover {
    border-color: var(--color-primary-300);
    color: var(--color-primary-700);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.visual-circle {
    position: absolute;
    border-radius: 50%;
    border: 2px solid;
    animation: pulse 4s ease-in-out infinite;
}

.visual-circle-1 {
    width: 300px;
    height: 300px;
    border-color: var(--color-primary-200);
    animation-delay: 0s;
}

.visual-circle-2 {
    width: 220px;
    height: 220px;
    border-color: var(--color-primary-300);
    animation-delay: 0.5s;
}

.visual-circle-3 {
    width: 140px;
    height: 140px;
    border-color: var(--color-accent-400);
    animation-delay: 1s;
}

.visual-icon {
    position: relative;
    width: 120px;
    height: 120px;
    color: var(--color-primary-600);
    animation: float 6s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.05);
        opacity: 1;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-gray-400);
    font-size: 0.875rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(8px);
    }
}

/* Hero Responsive */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        max-width: none;
    }

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

    .hero-visual {
        display: none;
    }

    .scroll-indicator {
        display: none;
    }
}

/* ============================================
   Services Section
   ============================================ */
.services {
    padding: var(--space-24) 0;
    background: var(--color-gray-50);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-8);
}

.service-card {
    background: white;
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-100);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.service-card-primary {
    border-color: var(--color-primary-200);
    background: linear-gradient(to bottom right, white, var(--color-primary-50));
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--color-primary-50);
    color: var(--color-primary-600);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
}

.service-card-primary .service-icon {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-accent-500));
    color: white;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-3);
}

.service-description {
    color: var(--color-gray-600);
    margin-bottom: var(--space-6);
    line-height: 1.7;
}

.service-features {
    margin-bottom: var(--space-6);
}

.service-features li {
    padding: var(--space-2) 0;
    padding-left: var(--space-6);
    position: relative;
    color: var(--color-gray-700);
    font-size: 0.95rem;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--color-accent-500);
    border-radius: 50%;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 600;
    color: var(--color-primary-600);
    transition: gap var(--transition-fast);
}

.service-link:hover {
    gap: var(--space-3);
}

/* Core Services Grid (3 columns) */
.services-core {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 1024px) {
    .services-core {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .services-core {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Labs Section
   ============================================ */
.labs {
    padding: var(--space-20) 0 var(--space-24);
    background: linear-gradient(180deg, var(--color-gray-50) 0%, white 100%);
}

.labs-header {
    position: relative;
}

.labs-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: linear-gradient(135deg, var(--color-warning), #ea580c);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.labs .section-title {
    color: var(--color-gray-700);
}

.labs .section-subtitle {
    color: var(--color-gray-500);
}

/* Labs Grid (4 columns) */
.services-labs {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

@media (max-width: 1024px) {
    .services-labs {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .services-labs {
        grid-template-columns: 1fr;
    }
}

/* Lab Card Style */
.service-card-lab {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px dashed var(--color-gray-200);
    transition: all var(--transition-base);
}

.service-card-lab:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-style: solid;
    border-color: var(--color-warning);
}

.service-card-lab .service-icon-small {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: var(--color-warning);
}

.service-card-lab:hover .service-link-icon {
    background: var(--color-warning);
    color: white;
}

/* Compact Service Card */
.service-card-compact {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-100);
    transition: all var(--transition-base);
}

.service-card-compact:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-200);
}

.service-icon-small {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--color-primary-50);
    color: var(--color-primary-600);
    border-radius: var(--radius-lg);
}

.service-card-content {
    flex: 1;
    min-width: 0;
}

.service-title-small {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--space-1);
}

.service-description-small {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.service-link-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    min-width: 36px;
    background: var(--color-gray-50);
    color: var(--color-gray-400);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.service-card-compact:hover .service-link-icon {
    background: var(--color-primary-600);
    color: white;
}

/* ============================================
   About Section
   ============================================ */
.about {
    padding: var(--space-24) 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-text .section-title {
    text-align: left;
    margin-bottom: var(--space-6);
}

.about-lead {
    font-size: 1.25rem;
    color: var(--color-gray-700);
    margin-bottom: var(--space-4);
    line-height: 1.8;
}

.about-lead strong {
    color: var(--color-primary-700);
}

.about-lead em {
    font-style: normal;
    color: var(--color-gray-500);
}

.about-text > p {
    color: var(--color-gray-600);
    line-height: 1.8;
    margin-bottom: var(--space-8);
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.value-item {
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
}

.value-number {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary-200);
    line-height: 1;
}

.value-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--space-1);
}

.value-content p {
    color: var(--color-gray-600);
    font-size: 0.95rem;
}

/* PDCA Cycle Visual */
.about-visual {
    display: flex;
    justify-content: center;
}

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

.pdca-cycle {
    position: relative;
    width: 280px;
    height: 280px;
}

.pdca-item {
    position: absolute;
    width: 100px;
    height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xl);
    color: white;
    font-weight: 600;
    transition: transform var(--transition-base);
}

.pdca-item:hover {
    transform: scale(1.1);
}

.pdca-label {
    font-size: 1.125rem;
}

.pdca-zh {
    font-size: 0.75rem;
    opacity: 0.9;
}

.pdca-plan {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.pdca-do {
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    background: linear-gradient(135deg, #10b981, #059669);
}

.pdca-check {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.pdca-act {
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.pdca-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--color-primary-700);
}

/* About Responsive */
@media (max-width: 968px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }

    .about-text .section-title {
        text-align: center;
    }

    .about-visual {
        order: -1;
    }
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    padding: var(--space-24) 0;
    background: linear-gradient(180deg, white 0%, var(--color-gray-50) 100%);
}

.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact .section-title {
    margin-bottom: var(--space-4);
}

.contact-lead {
    color: var(--color-gray-600);
    margin-bottom: var(--space-10);
}

.contact-methods {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    flex-wrap: wrap;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-6) var(--space-8);
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-100);
    min-width: 200px;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-200);
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-primary-50);
    color: var(--color-primary-600);
    border-radius: 50%;
}

.contact-label {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-value {
    font-weight: 600;
    color: var(--color-gray-800);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--space-12) 0;
    background: var(--color-gray-900);
    color: white;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: 1.25rem;
}

.footer-brand .logo-icon {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-accent-500));
}

.footer-brand .logo-text {
    color: white;
}

.footer-brand .logo-accent {
    color: var(--color-accent-400);
}

.footer-nav {
    display: flex;
    gap: var(--space-8);
    flex-wrap: wrap;
    justify-content: center;
}

.footer-nav a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-nav a:hover {
    color: white;
}

.footer-divider {
    color: var(--color-gray-600);
    user-select: none;
}

.footer-copyright {
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

/* ============================================
   Utility Classes
   ============================================ */
.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;
}

/* Print Styles */
@media print {
    .navbar,
    .scroll-indicator {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: var(--space-8) 0;
    }

    body {
        font-size: 12pt;
    }
}