/* ===================================
   DutyTick Portfolio Site - Main Styles
   =================================== */

/* CSS Variables - Design System */
:root {
    /* Colors from Logo */
    --primary-blue: #2196F3;
    --dark-slate: #607D8B;
    --success-green: #4CAF50;

    /* Neutral Colors - Light Mode */
    --white: #FFFFFF;
    --light-gray: #ECEFF1;
    --dark-text: #263238;
    --medium-gray: #90A4AE;

    /* Accent Colors */
    --error-red: #df1529;
    --warning-orange: #ff9c2c;

    /* Theme Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #ECEFF1;
    --bg-card: #FFFFFF;
    --bg-elevated: #FFFFFF;
    --text-primary: #263238;
    --text-secondary: #607D8B;
    --text-tertiary: #90A4AE;
    --border-color: #ECEFF1;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
    --gradient-cta: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
    --gradient-green: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
    --gradient-offer: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
    --gradient-badge: linear-gradient(135deg, #FF9800 0%, #FF5722 100%);

    /* Spacing System (8px base) */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;

    /* Breakpoints */
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;

    /* Typography */
    --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --primary-blue: #42a5f5;
    --dark-slate: #90A4AE;
    --success-green: #66bb6a;

    /* Softer Grayish Dark Tones (No Pure Black) */
    --bg-primary: #1e1e1e;
    --bg-secondary: #2a2a2a;
    --bg-card: #2d2d2d;
    --bg-elevated: #353535;
    --text-primary: #e8e8e8;
    --text-secondary: #b8b8b8;
    --text-tertiary: #888888;
    --border-color: #404040;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --shadow-hover: rgba(0, 0, 0, 0.6);

    /* Lighter, More Visible Dark Mode Gradients */
    --gradient-hero: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
    --gradient-cta: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
    --gradient-green: linear-gradient(135deg, #166534 0%, #16a34a 100%);
    --gradient-offer: linear-gradient(135deg, #166534 0%, #16a34a 100%);
    --gradient-badge: linear-gradient(135deg, #ea580c 0%, #f97316 100%);

    --error-red: #ef5350;
    --warning-orange: #ffa726;
}

/* ===================================
   Reset & Base Styles
   =================================== */

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

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

body {
    font-family: var(--font-system);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: 48px;
}

h2 {
    font-size: 36px;
}

h3 {
    font-size: 28px;
}

h4 {
    font-size: 20px;
}

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

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

a:hover {
    color: var(--dark-slate);
    opacity: 0.8;
}

ul {
    list-style: none;
}

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: #1976D2;
    color: var(--white);
}

.btn-success {
    background-color: var(--success-green);
    color: var(--white);
}

.btn-success:hover {
    background-color: #388E3C;
    color: var(--white);
}

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

.btn-outline:hover {
    background-color: var(--primary-blue);
    color: var(--white);
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* ===================================
   Header / Navigation
   =================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    box-shadow: 0 2px 8px var(--shadow-color);
    z-index: 1000;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-blue);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    padding: 0;
    margin-left: var(--spacing-sm);
}

.theme-toggle:hover {
    background-color: var(--border-color);
    transform: scale(1.1);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle svg {
    width: 22px;
    height: 22px;
    color: var(--text-primary);
    transition: transform 0.3s ease;
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: none;
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    padding-top: 120px;
    padding-bottom: var(--spacing-xxl);
    background: var(--gradient-hero);
    min-height: 80vh;
    transition: background 0.3s ease;
}

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

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

.hero-headline {
    font-size: 48px;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.hero-tagline {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

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

.stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 14px;
}

.stat-icon {
    width: 20px;
    height: 20px;
    color: var(--success-green);
}

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

.hero-illustration {
    max-width: 400px;
    width: 100%;
}

.hero-svg {
    width: 100%;
    height: auto;
}

/* ===================================
   Section Titles
   =================================== */

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

/* ===================================
   Problem Section
   =================================== */

.problem {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.problem-card {
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--bg-secondary);
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px var(--shadow-hover);
}

.problem-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-md);
    color: var(--error-red);
}

.problem-card h3 {
    font-size: 22px;
    margin-bottom: var(--spacing-sm);
}

.problem-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* ===================================
   How It Works Section
   =================================== */

.how-it-works {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-secondary);
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.step {
    text-align: center;
}

.step-number {
    width: 64px;
    height: 64px;
    background-color: var(--primary-blue);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

.step-content h3 {
    font-size: 24px;
    margin-bottom: var(--spacing-sm);
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.step-illustration {
    width: 100%;
    max-width: 200px;
    height: 150px;
}

/* ===================================
   Dual Channel Section
   =================================== */

.dual-channel {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.channel-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.channel-card {
    padding: var(--spacing-lg);
    border-radius: 12px;
    position: relative;
    border: 3px solid var(--border-color);
    background-color: var(--bg-card);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}

.channel-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px var(--shadow-hover);
}

.channel-card.primary {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.05) 0%, rgba(33, 150, 243, 0.1) 100%);
}

.channel-card.secondary {
    border-color: var(--dark-slate);
    background: linear-gradient(135deg, rgba(96, 125, 139, 0.05) 0%, rgba(96, 125, 139, 0.1) 100%);
}

/* Better visibility in dark mode */
[data-theme="dark"] .channel-card.primary {
    background: linear-gradient(135deg, rgba(66, 165, 245, 0.1) 0%, rgba(66, 165, 245, 0.15) 100%);
}

[data-theme="dark"] .channel-card.secondary {
    background: linear-gradient(135deg, rgba(144, 164, 174, 0.08) 0%, rgba(144, 164, 174, 0.12) 100%);
}

.channel-badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-md);
    background-color: var(--success-green);
    color: var(--white);
    padding: 4px 16px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.channel-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
    color: var(--primary-blue);
}

.channel-card.secondary .channel-icon {
    color: var(--dark-slate);
}

.channel-card h3 {
    font-size: 24px;
    margin-bottom: var(--spacing-md);
}

.feature-list {
    margin-bottom: var(--spacing-md);
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.checkmark {
    width: 20px;
    height: 20px;
    color: var(--success-green);
    flex-shrink: 0;
    margin-top: 2px;
}

.best-for {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 14px;
}

/* ===================================
   Features Section
   =================================== */

.features {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-lg);
    background-color: var(--bg-card);
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px var(--shadow-hover);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
    color: var(--primary-blue);
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* ===================================
   Use Cases Section
   =================================== */

.use-cases {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.use-case-card {
    padding: var(--spacing-lg);
    background: var(--gradient-green);
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.use-case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px var(--shadow-hover);
}

.use-case-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    color: var(--success-green);
}

.use-case-card h3 {
    font-size: 22px;
    margin-bottom: var(--spacing-sm);
}

.use-case-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* ===================================
   Why DutyTick Section
   =================================== */

.why-dutytick {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-secondary);
}

.benefits-list {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: var(--spacing-sm);
    background-color: var(--bg-card);
    border-radius: 8px;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.benefit-item:hover {
    transform: translateX(8px);
}

.benefit-icon {
    width: 24px;
    height: 24px;
    color: var(--success-green);
    flex-shrink: 0;
    margin-top: 2px;
}

.benefit-item div {
    color: var(--text-primary);
}

/* ===================================
   Pricing Section - Free Offer
   =================================== */

.pricing {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.pricing-subtitle {
    text-align: center;
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.free-offer-card {
    max-width: 700px;
    margin: 0 auto;
    background: var(--gradient-offer);
    border-radius: 16px;
    padding: var(--spacing-xl);
    box-shadow: 0 12px 40px rgba(76, 175, 80, 0.2);
    position: relative;
    transition: background 0.3s ease;
}

.offer-badge {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-badge);
    color: var(--white);
    padding: 8px 24px;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(255, 87, 34, 0.3);
}

.offer-content h3 {
    text-align: center;
    font-size: 32px;
    color: var(--success-green);
    margin-bottom: var(--spacing-sm);
}

.offer-description {
    text-align: center;
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.features-included {
    background-color: var(--bg-card);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    transition: background-color 0.3s ease;
}

.features-included h4 {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.included-features-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.included-features-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    color: var(--text-primary);
    font-size: 15px;
}

.feature-check {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.premium-note {
    background-color: rgba(255, 255, 255, 0.6);
    border-left: 4px solid var(--primary-blue);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
}

[data-theme="dark"] .premium-note {
    background-color: rgba(53, 53, 53, 0.5);
}

.premium-note p {
    margin: 0;
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.6;
}

.offer-cta {
    text-align: center;
}

.offer-cta .btn {
    margin-bottom: var(--spacing-sm);
}

.cta-note {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

/* ===================================
   Final CTA / Waitlist Section
   =================================== */

.final-cta {
    padding: var(--spacing-xxl) 0;
    background: var(--gradient-cta);
    transition: background 0.3s ease;
}

.cta-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.waitlist-form-container {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: 12px;
    box-shadow: 0 8px 32px var(--shadow-color);
    transition: background-color 0.3s ease;
}

/* ===================================
   Footer
   =================================== */

.footer {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    transition: background-color 0.3s ease, color 0.3s ease;
}

[data-theme="dark"] .footer {
    background-color: #1a1a1a;
    color: var(--text-primary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: var(--spacing-sm);
}

.footer-logo {
    width: 40px;
    height: 40px;
}

.footer-logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--bg-primary);
}

[data-theme="dark"] .footer-logo-text {
    color: var(--text-primary);
}

.footer-tagline {
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-sm);
}

.footer-parent {
    color: var(--text-tertiary);
    font-size: 14px;
}

.footer-parent a {
    color: var(--primary-blue);
}

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

[data-theme="dark"] .footer-parent a:hover {
    color: var(--primary-blue);
}

.footer-col h4 {
    color: var(--bg-primary);
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
}

[data-theme="dark"] .footer-col h4 {
    color: var(--text-primary);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-col a {
    color: var(--text-tertiary);
    transition: color 0.3s ease;
}

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

[data-theme="dark"] .footer-col a:hover {
    color: var(--primary-blue);
}

.footer-icon {
    width: 16px;
    height: 16px;
    display: inline-block;
    vertical-align: middle;
    margin-right: 8px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
}

.footer-bottom p {
    margin: 4px 0;
    font-size: 14px;
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet (768px and below) */
@media (max-width: 768px) {
    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 28px;
    }

    .hero .container {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        display: none;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn-large {
        width: 100%;
    }

    .problem-grid,
    .steps-container,
    .features-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }

    .free-offer-card {
        padding: var(--spacing-md);
    }

    .offer-content h3 {
        font-size: 24px;
    }

    .included-features-list li {
        font-size: 14px;
    }

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

    .benefits-list {
        grid-template-columns: 1fr;
    }

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

    .nav-menu {
        position: fixed;
        top: 72px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 72px);
        background-color: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-lg);
        transition: left 0.3s ease, background-color 0.3s ease;
        box-shadow: 0 8px 16px var(--shadow-color);
    }

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

    .nav-toggle {
        display: flex;
    }

    .nav .btn {
        display: none;
    }

    .theme-toggle {
        position: fixed;
        bottom: var(--spacing-lg);
        right: var(--spacing-lg);
        z-index: 999;
        box-shadow: 0 4px 12px var(--shadow-color);
    }
}

/* Mobile (576px and below) */
@media (max-width: 576px) {
    h1 {
        font-size: 28px;
    }

    h2 {
        font-size: 24px;
    }

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

    .hero-headline {
        font-size: 32px;
    }

    .hero-tagline {
        font-size: 16px;
    }

    .section-title {
        font-size: 28px;
    }

    .waitlist-form-container {
        padding: var(--spacing-md);
    }
}