/**
 * CRYPTOSIGN - Main Stylesheet
 * Minimalist design with flat colors
 * Version: 1.0.0
 */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    --color-primary: #0137A1;
    --color-secondary: #5B5A59;
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-success: #28A745;
    --color-error: #DC3545;
    --color-warning: #FFC107;
    --color-bg: #F5F5F5;
    --color-bg-light: #FAFAFA;
    --color-border: #E0E0E0;
    --color-text: #333333;
    --color-text-light: #666666;

    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --font-size-small: 14px;
    --font-size-large: 18px;
    --font-size-h1: 32px;
    --font-size-h2: 28px;
    --font-size-h3: 24px;

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;

    --border-radius: 4px;
    --box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }

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

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

a:hover {
    color: var(--color-secondary);
}

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

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(-1 * var(--spacing-sm));
}

.col {
    flex: 1;
    padding: 0 var(--spacing-sm);
}

.col-1 { width: 8.333%; }
.col-2 { width: 16.666%; }
.col-3 { width: 25%; }
.col-4 { width: 33.333%; }
.col-5 { width: 41.666%; }
.col-6 { width: 50%; }
.col-7 { width: 58.333%; }
.col-8 { width: 66.666%; }
.col-9 { width: 75%; }
.col-10 { width: 83.333%; }
.col-11 { width: 91.666%; }
.col-12 { width: 100%; }

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
    background-color: var(--color-white);
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

/* ============================================
   LOGO STYLES
   ============================================ */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-size: var(--font-size-large);
    font-weight: 700;
    color: var(--color-primary);
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.8;
}

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

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

@media (max-width: 768px) {
    .logo-img {
        height: 32px;
    }

    .logo-text {
        font-size: var(--font-size-base);
    }
}

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

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-bg-light);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-large);
    cursor: pointer;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

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

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

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

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

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

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

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

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-small);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-large);
}

/* ============================================
   FORMS
   ============================================ */
.form {
    max-width: 500px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-text);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(1, 55, 161, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-checkbox {
    margin-right: var(--spacing-sm);
}

.form-error {
    color: var(--color-error);
    font-size: var(--font-size-small);
    margin-top: var(--spacing-xs);
}

.form-success {
    color: var(--color-success);
    font-size: var(--font-size-small);
    margin-top: var(--spacing-xs);
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.card-title {
    margin: 0;
    font-size: var(--font-size-h3);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-light);
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

.alert-success {
    background-color: #D4EDDA;
    color: #155724;
    border: 1px solid #C3E6CB;
}

.alert-error {
    background-color: #F8D7DA;
    color: #721C24;
    border: 1px solid #F5C6CB;
}

.alert-warning {
    background-color: #FFF3CD;
    color: #856404;
    border: 1px solid #FFEEBA;
}

.alert-info {
    background-color: #D1ECF1;
    color: #0C5460;
    border: 1px solid #BEE5EB;
}

/* ============================================
   TABLES
   ============================================ */
.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table th {
    background-color: var(--color-bg-light);
    font-weight: 600;
    color: var(--color-primary);
}

.table tbody tr:hover {
    background-color: var(--color-bg-light);
}

/* ============================================
   STATUS BADGES
   ============================================ */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-small);
    font-weight: 500;
    border-radius: var(--border-radius);
    text-transform: uppercase;
}

.badge-draft {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

.badge-pending {
    background-color: var(--color-warning);
    color: var(--color-black);
}

.badge-active {
    background-color: var(--color-success);
    color: var(--color-white);
}

.badge-completed {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.badge-cancelled,
.badge-disputed {
    background-color: var(--color-error);
    color: var(--color-white);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-link {
    color: var(--color-white);
    transition: var(--transition);
}

.footer-link:hover {
    opacity: 0.8;
}

/* ============================================
   COOKIE CONSENT BANNER
   ============================================ */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-md) 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 9999;
}

.cookie-banner-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.cookie-banner-text {
    flex: 1;
}

.cookie-banner-text h4 {
    color: var(--color-white);
    margin: 0 0 var(--spacing-xs) 0;
    font-size: var(--font-size-base);
}

.cookie-banner-text p {
    margin: 0;
    font-size: var(--font-size-small);
    opacity: 0.9;
}

.cookie-banner-buttons {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.cookie-banner-buttons .btn {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-small);
}

.cookie-link {
    color: var(--color-white);
    text-decoration: underline;
    font-size: var(--font-size-small);
    transition: var(--transition);
}

.cookie-link:hover {
    opacity: 0.8;
}

@media (max-width: 768px) {
    .cookie-banner-content {
        flex-direction: column;
        text-align: center;
    }

    .cookie-banner-buttons {
        flex-direction: column;
        width: 100%;
    }

    .cookie-banner-buttons .btn {
        width: 100%;
    }
}

/* ============================================
   TERMS PAGE
   ============================================ */
.terms-content {
    max-width: 800px;
    margin: var(--spacing-lg) 0;
}

.terms-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.terms-section:last-child {
    border-bottom: none;
}

.terms-section h2 {
    font-size: var(--font-size-h3);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.terms-section p {
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ============================================
   LANGUAGE SWITCHER
   ============================================ */
.lang-switcher {
    display: flex;
    gap: var(--spacing-sm);
}

.lang-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.lang-btn:hover,
.lang-btn.active {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

.hidden { display: none; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        box-shadow: var(--box-shadow);
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
    }

    .nav.active {
        display: flex;
    }

    .col-1, .col-2, .col-3, .col-4,
    .col-5, .col-6, .col-7, .col-8,
    .col-9, .col-10, .col-11, .col-12 {
        width: 100%;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    h1 { font-size: 28px; }
    h2 { font-size: 24px; }
    h3 { font-size: 20px; }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .btn {
        width: 100%;
    }

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