/* Mobile-First CSS for VapeWissen.de */

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

:root {
    --green: #2ecc71;
    --dark-green: #27ae60;
    --bg: #0a0a0a;
    --card-bg: #1a1a1a;
    --text: #ffffff;
    --text-secondary: #b0b0b0;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

/* Typography - Mobile First */
h1 {
    font-size: clamp(1.75rem, 5vw, 3rem);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    line-height: 1.3;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    line-height: 1.4;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

p {
    margin-bottom: var(--spacing-sm);
    font-size: clamp(1rem, 2vw, 1.125rem);
}

/* Header */
header {
    background: var(--card-bg);
    padding: var(--spacing-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 2px solid var(--green);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.logo {
    font-size: clamp(1.25rem, 4vw, 1.5rem);
    font-weight: bold;
    color: var(--green);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: var(--spacing-sm);
    list-style: none;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: background 0.3s;
    font-size: clamp(0.875rem, 2vw, 1rem);
}

.nav-links a:hover {
    background: rgba(46, 204, 113, 0.1);
}

/* Main Content */
main {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.hero h1 {
    font-size: clamp(2rem, 6vw, 3.5rem);
    margin-bottom: var(--spacing-sm);
}

.tagline {
    font-size: clamp(1.125rem, 3vw, 1.5rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Article Meta */
.article-meta {
    color: var(--text-secondary);
    font-size: clamp(0.875rem, 2vw, 1rem);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.meta {
    color: var(--text-secondary);
    font-size: clamp(0.875rem, 2vw, 1rem);
}

/* Content Blocks */
.content {
    font-size: clamp(1rem, 2vw, 1.125rem);
    line-height: 1.8;
}

.content ul, .content ol {
    margin: var(--spacing-sm) 0 var(--spacing-sm) var(--spacing-md);
}

.content li {
    margin-bottom: var(--spacing-xs);
}

.content a {
    color: var(--green);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.content a:hover {
    border-bottom-color: var(--green);
}

.content table {
    width: 100%;
    overflow-x: auto;
    display: block;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
}

.content th, .content td {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid rgba(255,255,255,0.1);
    text-align: left;
}

.content th {
    background: rgba(46, 204, 113, 0.1);
    font-weight: bold;
}

/* Highlight Boxes */
.highlight {
    background: rgba(46, 204, 113, 0.1);
    border-left: 4px solid var(--green);
    padding: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    border-radius: 4px;
}

.highlight strong {
    color: var(--green);
}

.highlight h3 {
    margin-top: 0;
}

/* Cards */
.product-card, .article-card {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin: var(--spacing-md) 0;
    border: 1px solid rgba(255,255,255,0.1);
}

.product-card h3, .article-card h3 {
    margin-top: 0;
}

.article-card h3 a {
    color: var(--green);
    text-decoration: none;
}

.article-card h3 a:hover {
    text-decoration: underline;
}

.read-more {
    color: var(--green);
    text-decoration: none;
}

.read-more:hover {
    text-decoration: underline;
}

/* Product Price */
.price {
    font-size: 1.5rem;
    color: var(--green);
    font-weight: bold;
    margin: var(--spacing-sm) 0;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--green);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    transition: background 0.3s;
    text-align: center;
    font-size: clamp(1rem, 2vw, 1.125rem);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: var(--dark-green);
}

/* Sections */
.articles-section, .products-section, .quick-tips, .newsletter {
    margin: var(--spacing-xl) 0;
}

.products-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid rgba(255,255,255,0.1);
}

/* Newsletter */
.newsletter {
    text-align: center;
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin: var(--spacing-xl) 0;
}

.newsletter h3 {
    margin-top: 0;
}

.newsletter form {
    max-width: 400px;
    margin: var(--spacing-md) auto 0;
}

.newsletter input[type="email"] {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: 1rem;
    border: 1px solid rgba(255,255,255,0.2);
    background: var(--bg);
    color: var(--text);
    border-radius: 4px;
    margin-bottom: var(--spacing-sm);
}

.newsletter button {
    width: 100%;
}

/* ConvertKit Form Styling */
.newsletter .formkit-form {
    max-width: 400px !important;
    margin: var(--spacing-md) auto 0 !important;
}

.newsletter .formkit-field {
    margin-bottom: var(--spacing-sm) !important;
}

.newsletter .formkit-input {
    width: 100% !important;
    padding: var(--spacing-sm) !important;
    font-size: 1rem !important;
    border: 1px solid rgba(255,255,255,0.2) !important;
    background: var(--bg) !important;
    color: var(--text) !important;
    border-radius: 4px !important;
}

.newsletter .formkit-input:focus {
    outline: none !important;
    border-color: var(--green) !important;
}

.newsletter .formkit-submit {
    width: 100% !important;
    padding: var(--spacing-sm) var(--spacing-lg) !important;
    background: var(--green) !important;
    color: white !important;
    border: none !important;
    border-radius: 4px !important;
    font-weight: bold !important;
    cursor: pointer !important;
    font-size: 1rem !important;
    transition: background 0.3s !important;
}

.newsletter .formkit-submit:hover {
    background: var(--dark-green) !important;
}

.newsletter .formkit-alert {
    margin-top: var(--spacing-sm) !important;
    padding: var(--spacing-xs) !important;
    border-radius: 4px !important;
}

.newsletter .formkit-alert-success {
    background: rgba(46, 204, 113, 0.2) !important;
    color: var(--green) !important;
}

.newsletter .formkit-alert-error {
    background: rgba(231, 76, 60, 0.2) !important;
    color: #e74c3c !important;
}

/* Footer */
footer {
    background: var(--card-bg);
    padding: var(--spacing-lg) var(--spacing-md);
    margin-top: var(--spacing-xl);
    text-align: center;
    border-top: 2px solid var(--green);
}

footer p {
    color: var(--text-secondary);
    font-size: clamp(0.875rem, 2vw, 1rem);
    margin-bottom: var(--spacing-xs);
}

.disclaimer {
    font-size: 0.75rem !important;
    opacity: 0.6;
}

/* Tablet & Desktop */
@media (min-width: 768px) {
    header {
        padding: var(--spacing-md);
    }

    main {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .content {
        font-size: 1.125rem;
    }

    .content table {
        display: table;
    }
}

/* Touch-Friendly (44x44px minimum) */
@media (hover: none) and (pointer: coarse) {
    .nav-links a,
    .btn,
    .read-more {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}