/* ===================================
   WeQRious Landing Page Styles
   =================================== */

/* CSS Variables */
:root {
    /* Primary Colors - from logo */
    --color-primary: #00a8e8;
    --color-primary-dark: #0077b6;
    --color-primary-light: #90e0ef;

    /* Neutrals */
    --color-text: #1a1a2e;
    --color-text-light: #4a4a68;
    --color-text-muted: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #1a1a2e;
    --color-border: #e5e7eb;

    /* Accent */
    --color-accent: #00d9ff;
    --color-success: #10b981;
    --color-warning: #f59e0b;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 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;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --color-text: #f1f5f9;
    --color-text-light: #cbd5e1;
    --color-text-muted: #94a3b8;
    --color-bg: #0f172a;
    --color-bg-alt: #1e293b;
    --color-bg-dark: #020617;
    --color-border: #334155;

    /* Adjusted shadows for dark mode */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

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

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

/* Section Base */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
}

/* ===================================
   Navigation
   =================================== */
.nav {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    width: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    grid-column: 2;
    justify-self: center;
}

.nav-logo {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
}

.nav-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-bg);
}

.nav-cta {
    background-color: var(--color-bg);
    color: var(--color-primary-dark);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Theme Switcher (3-way toggle) */
.theme-switcher {
    display: flex;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
    padding: 3px;
    gap: 2px;
    grid-column: 3;
    justify-self: end;
}

.theme-option {
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    padding: 6px 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.theme-option:hover {
    background: rgba(255, 255, 255, 0.2);
}

.theme-option.active {
    background: rgba(255, 255, 255, 0.95);
}

.theme-option svg {
    width: 16px;
    height: 16px;
    color: rgba(255, 255, 255, 0.9);
    transition: color var(--transition-base);
}

.theme-option.active svg {
    color: var(--color-primary-dark);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-accent) 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.hero-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl);
}

.hero-logo {
    width: 180px;
    height: auto;
    margin-bottom: var(--spacing-xl);
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-bg);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-2xl);
    max-width: 500px;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: var(--color-bg);
    color: var(--color-primary-dark);
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-lg);
    transition: all var(--transition-base);
}

.hero-cta:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* ===================================
   Problems Section
   =================================== */
.problems {
    background-color: var(--color-bg-alt);
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.problem-card {
    background-color: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

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

.problem-icon {
    width: 48px;
    height: 48px;
    background-color: #fef2f2;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.problem-icon svg {
    width: 24px;
    height: 24px;
    color: #ef4444;
}

.problem-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.problem-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* ===================================
   Solutions Section
   =================================== */
.solutions {
    background-color: var(--color-bg);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.solution-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.solution-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

.solution-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.solution-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.solution-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.solution-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* ===================================
   How It Works Section
   =================================== */
.how-it-works {
    background-color: var(--color-bg-alt);
}

.steps {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    gap: var(--spacing-lg);
}

.step {
    flex: 1;
    min-width: 180px;
    max-width: 220px;
    text-align: center;
}

.step-number {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

.step h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.step p {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
}

.step-connector {
    width: 40px;
    height: 2px;
    background-color: var(--color-border);
    margin-top: 24px;
    flex-shrink: 0;
}

/* ===================================
   Preview Section
   =================================== */
.preview {
    background-color: var(--color-bg);
}

.preview-placeholder {
    display: flex;
    justify-content: center;
}

.preview-box {
    width: 100%;
    max-width: 900px;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, #e2e8f0 100%);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.preview-box svg {
    width: 64px;
    height: 64px;
    color: var(--color-text-muted);
}

.preview-box p {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #16213e 100%);
    color: white;
}

.contact .section-title {
    color: white;
}

.contact .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.contact-list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: white;
    font-size: var(--font-size-xl);
    font-weight: 500;
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-base);
}

.contact-item:hover {
    background-color: var(--color-primary);
    transform: scale(1.05);
}

.contact-item svg {
    width: 24px;
    height: 24px;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--color-bg-dark);
    color: white;
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

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

.footer-logo {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
}

.footer-brand span {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.footer-company {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-size-sm);
}

/* ===================================
   Dark Mode Adjustments
   =================================== */
[data-theme="dark"] .problem-card {
    background-color: var(--color-bg-alt);
    border-color: var(--color-border);
}

[data-theme="dark"] .problem-icon {
    background-color: rgba(239, 68, 68, 0.15);
}

[data-theme="dark"] .solution-card {
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    border-color: var(--color-border);
}

[data-theme="dark"] .preview-box {
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    border-color: var(--color-border);
}

[data-theme="dark"] .section-title {
    color: var(--color-text);
}

[data-theme="dark"] .problem-card h3,
[data-theme="dark"] .solution-card h3,
[data-theme="dark"] .step h3 {
    color: var(--color-text);
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #023047 0%, #005577 50%, #0077a0 100%);
}

[data-theme="dark"] .contact {
    background: linear-gradient(135deg, #020617 0%, #0f172a 100%);
}

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

/* Tablet */
@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }

    .steps {
        flex-direction: column;
        align-items: center;
    }

    .step {
        max-width: 100%;
    }

    .step-connector {
        width: 2px;
        height: 24px;
        margin: 0;
    }

    .problems-grid,
    .solutions-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .nav {
        padding: var(--spacing-md);
    }

    .nav-title {
        font-size: var(--font-size-lg);
    }

    .hero-logo {
        width: 140px;
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .hero-cta {
        padding: var(--spacing-sm) var(--spacing-xl);
        font-size: var(--font-size-base);
    }

    .contact-item {
        font-size: var(--font-size-lg);
        padding: var(--spacing-sm) var(--spacing-lg);
    }
}