/* ==========================================================================
   EpiPower.se - Design System
   ========================================================================== */

:root {
    --color-primary: #ff6b35;
    --color-primary-dark: #e55a2b;
    --color-primary-light: #fff4ef;
    --color-text: #1a1a2e;
    --color-text-light: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fc;
    --color-border: #e5e7eb;
    --color-dark: #1a1a2e;
    --color-dark-light: #2d2d44;
    --font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --max-width: 1200px;
    --section-padding: 100px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
}

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

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

html {
    scroll-behavior: smooth;
}

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

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

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

a:hover {
    color: var(--color-primary-dark);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-text);
    line-height: 1.3;
    font-weight: 700;
}

h1 { font-size: 3.2rem; }
h2 { font-size: 2.4rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.15rem; }

ul {
    list-style: none;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

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

.section--alt {
    background: var(--color-bg-alt);
}

.section--dark {
    background: var(--color-dark);
    color: #ffffff;
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
    color: #ffffff;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-header h2 {
    margin-bottom: 16px;
}

.section-header p {
    color: var(--color-text-light);
    font-size: 1.15rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.grid-4 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: box-shadow var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
    border-bottom-color: var(--color-border);
}

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

.nav-logo {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-menu a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-menu a:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.nav-menu a:visited {
    color: var(--color-text);
}

.nav-menu a:visited:hover {
    color: var(--color-primary);
}

.nav-cta {
    background: var(--color-primary);
    color: #fff !important;
    padding: 8px 20px !important;
    border-radius: 24px !important;
    font-weight: 600 !important;
    font-size: 0.9rem !important;
    transition: all var(--transition);
}

.nav-cta:hover {
    background: var(--color-primary-dark) !important;
    color: #fff !important;
    transform: translateY(-1px);
}

.nav-cta:visited {
    color: #fff !important;
}

/* Hamburger */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    margin: 5px 0;
    transition: all var(--transition);
    border-radius: 2px;
}

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

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

.nav-open .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
}

.nav-open .nav-overlay {
    display: block;
}

/* ==========================================================================
   Page Header (subpages)
   ========================================================================== */

.page-header {
    padding: 120px 0 60px;
    background: var(--color-bg-alt);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.page-header p {
    color: var(--color-text-light);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================================================
   Hero (Landing Page)
   ========================================================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--color-primary-light) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    line-height: 1.15;
}

.hero .subtitle {
    font-size: 1.25rem;
    color: var(--color-text-light);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-badges {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
}

.badge svg {
    width: 16px;
    height: 16px;
    color: var(--color-primary);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 28px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    font-family: var(--font-family);
}

.btn--primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 107, 53, 0.3);
}

.btn--primary:visited {
    color: #fff;
}

.btn--outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn--outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn--outline:visited {
    color: var(--color-text);
}

.btn--white {
    background: #fff;
    color: var(--color-primary);
    border-color: #fff;
}

.btn--white:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    color: var(--color-primary);
}

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

.btn--sm {
    padding: 10px 24px;
    font-size: 0.9rem;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    transition: all var(--transition);
}

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

.card-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.card-icon svg {
    width: 24px;
    height: 24px;
}

.card h3 {
    margin-bottom: 12px;
}

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

.card--bordered {
    border-left: 4px solid var(--color-primary);
}

/* Card on dark background */
.section--dark .card {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.12);
}

.section--dark .card:hover {
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.section--dark .card p {
    color: rgba(255, 255, 255, 0.75);
}

.section--dark .card-icon {
    background: rgba(255, 107, 53, 0.15);
}

/* ==========================================================================
   Feature List
   ========================================================================== */

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: 12px 0;
    padding-left: 32px;
    position: relative;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 16px;
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border-radius: 50%;
}

.feature-list li::after {
    content: '';
    position: absolute;
    left: 0;
    top: 16px;
    width: 18px;
    height: 18px;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"/></svg>');
    background-size: 10px;
    background-repeat: no-repeat;
    background-position: center;
}

.section--dark .feature-list li {
    color: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   Process Steps
   ========================================================================== */

.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    counter-reset: step;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    margin-bottom: 12px;
}

.step p {
    color: var(--color-text-light);
    max-width: 320px;
    margin: 0 auto;
}

/* ==========================================================================
   Screenshots
   ========================================================================== */

.screenshot-container {
    text-align: center;
    margin: 40px 0;
}

.screenshot {
    max-width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.screenshot-caption {
    margin-top: 16px;
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-style: italic;
}

.screenshot-placeholder {
    background: var(--color-bg-alt);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 60px 32px;
    text-align: center;
    color: var(--color-text-light);
    font-style: italic;
    margin: 20px 0;
}

/* ==========================================================================
   Highlight / Info / Warning boxes
   ========================================================================== */

.highlight-box {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    padding: 32px;
    border-radius: var(--radius);
    text-align: center;
}

.highlight-box h4 {
    color: #fff;
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.highlight-box a {
    color: #fff;
    text-decoration: underline;
}

.highlight-box a:hover {
    opacity: 0.9;
}

.info-box {
    background: #eff6ff;
    border-left: 4px solid #3b82f6;
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    margin: 24px 0;
}

.warning-box {
    background: #fffbeb;
    border-left: 4px solid #f59e0b;
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    margin: 24px 0;
    color: #92400e;
}

.warning-box h4 {
    color: #92400e;
    margin-bottom: 8px;
}

.warning-box ul {
    padding-left: 20px;
    list-style: disc;
}

.warning-box li {
    margin-bottom: 4px;
}

.success-box {
    background: #f0fdf4;
    border-left: 4px solid #22c55e;
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    margin: 24px 0;
    color: #166534;
}

.success-box h4 {
    color: #166534;
    margin-bottom: 8px;
}

.error-box {
    background: #fef2f2;
    border-left: 4px solid #ef4444;
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    margin: 24px 0;
    color: #991b1b;
}

.error-box h4 {
    color: #991b1b;
    margin-bottom: 8px;
}

/* ==========================================================================
   Hardware Section
   ========================================================================== */

.hardware-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.hardware-item {
    text-align: center;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
}

.hardware-item h3 {
    margin-bottom: 8px;
}

.hardware-item .hw-subtitle {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.hardware-item p {
    color: var(--color-text-light);
}

/* ==========================================================================
   EpiCert Connection
   ========================================================================== */

.epicert-section {
    background: var(--color-primary-light);
}

.epicert-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    align-items: center;
}

.epicert-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.epicert-flow .flow-item {
    background: var(--color-bg);
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    border: 1px solid var(--color-border);
    text-align: center;
}

.epicert-flow .flow-arrow {
    color: var(--color-primary);
    font-size: 1.5rem;
    font-weight: 700;
}

/* ==========================================================================
   CTA Section
   ========================================================================== */

.cta-section {
    padding: var(--section-padding) 0;
    text-align: center;
}

.cta-section h2 {
    margin-bottom: 16px;
}

.cta-section .subtitle {
    color: var(--color-text-light);
    font-size: 1.15rem;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-contact {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.cta-contact a {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-text);
}

.cta-contact a:hover {
    color: var(--color-primary);
}

.cta-note {
    margin-top: 24px;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* ==========================================================================
   Contact Form
   ========================================================================== */

.contact-form {
    background: var(--color-bg);
    padding: 40px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.contact-form h3 {
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

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

.submit-button {
    background: var(--color-primary);
    color: #fff;
    padding: 14px 32px;
    border: none;
    border-radius: 28px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    width: 100%;
    font-family: var(--font-family);
}

.submit-button:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 107, 53, 0.3);
}

/* General button reset */
button, input[type="button"], input[type="submit"] {
    font-family: var(--font-family);
}

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

.footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 80px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-section h3 {
    color: #ffffff;
    font-size: 1.1rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-section p {
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.65);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color var(--transition);
}

.footer-section ul li a:hover {
    color: var(--color-primary);
}

.footer-section ul li a:visited {
    color: rgba(255, 255, 255, 0.65);
}

.footer-section ul li a:visited:hover {
    color: var(--color-primary);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.875rem;
}

/* ==========================================================================
   Animations
   ========================================================================== */

.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.fade-up-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.fade-up-children.visible > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: translateY(0); }
.fade-up-children.visible > *:nth-child(2) { transition-delay: 0.1s; opacity: 1; transform: translateY(0); }
.fade-up-children.visible > *:nth-child(3) { transition-delay: 0.2s; opacity: 1; transform: translateY(0); }
.fade-up-children.visible > *:nth-child(4) { transition-delay: 0.3s; opacity: 1; transform: translateY(0); }
.fade-up-children.visible > *:nth-child(n+5) { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }

/* ==========================================================================
   Utility
   ========================================================================== */

.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.mb-24 { margin-bottom: 24px; }
.mb-40 { margin-bottom: 40px; }

/* ==========================================================================
   Responsive: Tablet (768px+)
   ========================================================================== */

@media (min-width: 768px) {
    h1 { font-size: 3.2rem; }
    h2 { font-size: 2.4rem; }

    .grid-2 {
        grid-template-columns: 1fr 1fr;
    }

    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .epicert-content {
        grid-template-columns: 1fr 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==========================================================================
   Responsive: Desktop (1024px+)
   ========================================================================== */

@media (min-width: 1024px) {
    .hero h1 {
        font-size: 3.8rem;
    }

    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-content {
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
    }
}

/* ==========================================================================
   Responsive: Mobile (<768px)
   ========================================================================== */

@media (max-width: 767px) {
    :root {
        --section-padding: 64px;
    }

    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }

    .hamburger {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        width: 280px;
        height: 100vh;
        background: var(--color-bg);
        flex-direction: column;
        align-items: flex-start;
        padding: 80px 32px 32px;
        gap: 4px;
        transform: translateX(100%);
        transition: transform var(--transition);
        box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
        z-index: 999;
    }

    .nav-open .nav-menu {
        transform: translateX(0);
    }

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

    .nav-menu a {
        display: block;
        padding: 12px 16px;
        font-size: 1.05rem;
    }

    .nav-cta {
        margin-top: 16px;
        text-align: center;
        display: block !important;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }

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

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

    .section-header {
        margin-bottom: 40px;
    }

    .card {
        padding: 24px;
    }

    .contact-form {
        padding: 24px;
    }

    .cta-contact {
        flex-direction: column;
        gap: 16px;
        align-items: center;
    }

    .epicert-flow {
        flex-direction: column;
    }

    .page-header {
        padding: 100px 0 40px;
    }

    .page-header h1 {
        font-size: 2rem;
    }
}

/* ==========================================================================
   Debug (admin pages)
   ========================================================================== */

.debug-box {
    background: var(--color-bg-alt);
    padding: 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    max-height: 600px;
    overflow-y: auto;
    font-family: monospace;
    font-size: 12px;
    white-space: pre-wrap;
}

.logout-link {
    color: var(--color-primary);
}