/* ============================================
   B.R.I.D.G.E Project - Visual Design System
   Based on logo colors & professional UI design
   ============================================ */

/* Design Tokens (CSS Custom Properties) */
:root {
    /* Color System - From Logo */
    --color-primary-green: #2D7A4F;
    --color-primary-green-hover: #246239;
    --color-sky-blue: #7EC8E3;
    --color-sky-blue-light: #A8D8EA;
    --color-bridge-gold: #C9A961;
    --color-bridge-gold-light: #E0C78A;

    /* Semantic Colors */
    --color-success: #C9A961;
    --color-warning: #F39C12;
    --color-error: #E74C3C;
    --color-info: #7EC8E3;

    /* Neutral Palette */
    --color-text-primary: #2C3E50;
    --color-text-secondary: #7F8C8D;
    --color-background: #F8F9FA;
    --color-white: #FFFFFF;
    --color-border: #E0E6ED;
    --color-border-light: #F0F3F7;

    /* Typography */
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    /* Type Scale */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 2rem;        /* 32px */
    --text-4xl: 2.5rem;      /* 40px */

    /* Spacing Scale (8px base) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;
}

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Poppins:wght@500;600;700&display=swap');

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    padding-top: 70px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.2;
    font-weight: 600;
}

/* ============================================
   NAVIGATION BAR
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-primary-green);
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    color: var(--color-white);
    font-size: var(--text-xl);
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    transition: opacity 0.2s ease;
}

.nav-brand:hover {
    opacity: 0.9;
}

.nav-brand .logo {
    height: 50px;
    width: 50px;
    border-radius: var(--radius-full);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-links a {
    color: var(--color-white);
    text-decoration: none;
    font-size: var(--text-base);
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
}

.nav-links a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: var(--space-md) var(--space-lg);
    }

    .nav-brand {
        margin-bottom: var(--space-md);
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-md);
    }

    .nav-links a {
        font-size: var(--text-sm);
    }
}

/* ============================================
   MAIN CONTENT
   ============================================ */

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    text-align: center;
    padding: var(--space-3xl) var(--space-lg);
    background: linear-gradient(135deg,
        rgba(126, 200, 227, 0.15) 0%,
        rgba(45, 122, 79, 0.08) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-2xl);
    border: 1px solid var(--color-border-light);
    position: relative;
    overflow: hidden;
}

/* Subtle decorative elements */
.hero::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(201, 169, 97, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50px;
    left: -50px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(126, 200, 227, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

/* Hero Logo */
.hero-logo {
    width: 360px;
    height: 360px;
    margin: 0 auto var(--space-md);
    display: block;
    border-radius: 50%;
    box-shadow: var(--shadow-xl);
    border: 8px solid var(--color-white);
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Curved Bridge Text */
.bridge-text {
    width: 100%;
    max-width: 900px;
    height: 200px;
    margin: 0 auto var(--space-md);
    display: block;
}

.bridge-title {
    font-family: var(--font-heading);
}

/* Add subtle animation to bridge text */
@keyframes bridgeGlow {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.9;
    }
}

.hero h1 {
    font-size: var(--text-4xl);
    color: var(--color-primary-green);
    margin-bottom: var(--space-lg);
    font-weight: 700;
}

.hero .subtitle {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    margin-top: var(--space-md);
    margin-bottom: var(--space-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

@media (max-width: 768px) {
    .hero {
        padding: var(--space-2xl) var(--space-md);
    }

    .hero-logo {
        width: 260px;
        height: 260px;
    }

    .bridge-text {
        height: 180px;
    }

    .bridge-title {
        font-size: 48px;
    }

    .hero h1 {
        font-size: var(--text-3xl);
    }

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

    .hero::before,
    .hero::after {
        display: none; /* Hide decorative elements on mobile */
    }
}

/* ============================================
   CONTENT SECTIONS
   ============================================ */

.content-section {
    margin-bottom: var(--space-2xl);
    padding: var(--space-2xl);
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.content-section h1 {
    font-size: var(--text-4xl);
    color: var(--color-primary-green);
    margin-bottom: var(--space-xl);
}

.content-section h2 {
    font-size: var(--text-3xl);
    color: var(--color-primary-green);
    margin-bottom: var(--space-lg);
}

.content-section p {
    font-size: var(--text-lg);
    margin-bottom: var(--space-md);
    line-height: 1.7;
    color: var(--color-text-primary);
}

/* Section Header with Underline */
.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-header h2 {
    margin-bottom: var(--space-sm);
}

.header-underline {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary-green), var(--color-bridge-gold));
    margin: 0 auto;
    border-radius: var(--radius-full);
}

/* Mission Section */
.mission-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.mission-card {
    background: linear-gradient(135deg,
        rgba(126, 200, 227, 0.05) 0%,
        rgba(45, 122, 79, 0.03) 100%);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 2px solid var(--color-border-light);
    transition: all 0.3s ease;
}

.mission-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-sky-blue);
}

.mission-card h3 {
    font-size: var(--text-2xl);
    color: var(--color-primary-green);
    margin-bottom: var(--space-lg);
    font-family: var(--font-heading);
    border-bottom: 3px solid var(--color-bridge-gold);
    padding-bottom: var(--space-sm);
}

.mission-card p {
    font-size: var(--text-base);
    color: var(--color-text-primary);
    line-height: 1.6;
    margin-bottom: 0;
}

.mission-summary {
    text-align: center;
    padding: var(--space-xl);
    background: linear-gradient(135deg,
        rgba(201, 169, 97, 0.08) 0%,
        rgba(45, 122, 79, 0.05) 100%);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-bridge-gold);
}

.mission-summary p {
    font-size: var(--text-xl);
    color: var(--color-primary-green);
    margin-bottom: 0;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .mission-content {
        grid-template-columns: 1fr;
    }

    .mission-card {
        padding: var(--space-lg);
    }

    .mission-summary p {
        font-size: var(--text-lg);
    }
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: var(--space-md) var(--space-xl);
    font-size: var(--text-base);
    font-weight: 500;
    font-family: var(--font-body);
    text-decoration: none;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
    min-height: 44px; /* Accessibility: min touch target */
}

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

.btn-primary:hover {
    background-color: var(--color-primary-green-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background-color: #6AB8D5;
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-secondary:active {
    transform: translateY(0);
}

.donate-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-top: var(--space-lg);
    justify-content: center;
}

/* Donate Section */
.donate-intro {
    text-align: center;
    margin-bottom: var(--space-xl);
    padding: 0 var(--space-lg);
}

.donate-intro p {
    font-size: var(--text-xl);
    color: var(--color-text-primary);
    line-height: 1.7;
    max-width: 700px;
    margin: 0 auto;
}

.donate-info-box {
    background-color: rgba(126, 200, 227, 0.08);
    border: 2px solid var(--color-sky-blue);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
    text-align: center;
}

.donate-info-box p {
    margin-bottom: 0;
    font-size: var(--text-base);
    color: var(--color-text-primary);
}

.donate-impact {
    text-align: center;
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 2px dashed var(--color-border);
}

.impact-text {
    font-size: var(--text-xl);
    color: var(--color-bridge-gold);
    font-weight: 500;
}

/* Disabled Button Styles */
.btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
    opacity: 0.6;
    box-shadow: none;
}

.btn:disabled:hover {
    background-color: #ccc;
    transform: none;
}

/* ============================================
   DISCLAIMER BOX
   ============================================ */

.disclaimer-box {
    background-color: rgba(126, 200, 227, 0.1);
    border-left: 4px solid var(--color-sky-blue);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.disclaimer-box p {
    margin-bottom: var(--space-sm);
    font-size: var(--text-base);
    line-height: 1.6;
}

.disclaimer-box p:last-child {
    margin-bottom: 0;
}

.disclaimer-box a {
    color: var(--color-primary-green);
    font-weight: 500;
    text-decoration: underline;
}

.disclaimer-box a:hover {
    color: var(--color-primary-green-hover);
}

/* ============================================
   FORMS
   ============================================ */

.application-form,
.volunteer-form {
    max-width: 700px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 500;
    color: var(--color-text-primary);
    font-size: var(--text-base);
}

.sub-label {
    margin-top: var(--space-md);
    font-weight: 400;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.required {
    color: var(--color-error);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-family: var(--font-body);
    transition: all 0.2s ease;
    background-color: var(--color-white);
    min-height: 44px; /* Accessibility: min touch target */
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="tel"]:focus,
.form-group input[type="number"]:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary-green);
    box-shadow: 0 0 0 3px rgba(45, 122, 79, 0.1);
}

.form-group input[type="file"] {
    width: 100%;
    padding: var(--space-sm);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.form-group input[type="file"]:hover {
    border-color: var(--color-primary-green);
}

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

.other-explain {
    margin-top: var(--space-sm);
}

.checkbox-group,
.radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.checkbox-label,
.radio-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 400;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
    min-height: 44px; /* Accessibility: min touch target */
}

.checkbox-label:hover,
.radio-label:hover {
    background-color: var(--color-background);
}

.checkbox-label input[type="checkbox"],
.radio-label input[type="radio"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-primary-green);
}

.form-note {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    font-style: italic;
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background-color: var(--color-background);
    border-radius: var(--radius-sm);
}

.volunteer-intro {
    font-size: var(--text-lg);
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background-color: rgba(201, 169, 97, 0.1);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-bridge-gold);
    line-height: 1.7;
}

/* ============================================
   RESOURCES PAGE
   ============================================ */

.resource-section {
    margin-bottom: var(--space-2xl);
}

.resource-section h2 {
    font-size: var(--text-2xl);
    color: var(--color-primary-green);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid rgba(45, 122, 79, 0.2);
}

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

.resource-list li {
    margin-bottom: var(--space-sm);
}

.resource-list a {
    color: var(--color-primary-green);
    text-decoration: none;
    font-size: var(--text-base);
    display: block;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    border: 1px solid transparent;
    min-height: 44px; /* Accessibility */
    display: flex;
    align-items: center;
}

.resource-list a:hover {
    background-color: rgba(126, 200, 227, 0.08);
    border-color: var(--color-border);
    transform: translateX(4px);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
    background-color: var(--color-primary-green);
    color: var(--color-white);
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    margin-top: var(--space-3xl);
}

footer p {
    font-size: var(--text-sm);
}

/* ============================================
   MODAL STYLES
   ============================================ */

.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--color-white);
    margin: 10% auto;
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    max-width: 500px;
    box-shadow: var(--shadow-xl);
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-modal {
    color: var(--color-text-secondary);
    position: absolute;
    top: var(--space-md);
    right: var(--space-lg);
    font-size: 32px;
    font-weight: bold;
    cursor: pointer;
    line-height: 20px;
    transition: color 0.2s ease;
}

.close-modal:hover,
.close-modal:focus {
    color: var(--color-text-primary);
}

.modal-content h2 {
    color: var(--color-primary-green);
    margin-bottom: var(--space-lg);
    margin-top: var(--space-sm);
}

.zelle-info {
    margin-top: var(--space-lg);
}

.zelle-info p {
    margin-bottom: var(--space-sm);
}

.zelle-placeholder {
    font-size: var(--text-xl);
    color: var(--color-primary-green);
    font-weight: 600;
    padding: var(--space-lg);
    background-color: rgba(45, 122, 79, 0.08);
    border-radius: var(--radius-md);
    text-align: center;
    border: 2px dashed var(--color-primary-green);
}

.info-note {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    font-style: italic;
    margin-top: var(--space-md);
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
    :root {
        --text-4xl: 2rem;
        --text-3xl: 1.75rem;
        --text-2xl: 1.5rem;
    }

    main {
        padding: var(--space-md);
    }

    .content-section {
        padding: var(--space-lg);
    }

    .btn {
        padding: var(--space-md) var(--space-lg);
        font-size: var(--text-sm);
    }

    .donate-buttons {
        flex-direction: column;
    }

    .donate-buttons .btn {
        width: 100%;
    }

    .modal-content {
        margin: 20% auto;
        padding: var(--space-lg);
        max-width: 90%;
    }
}

/* ============================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================ */

/* Focus visible (keyboard navigation) */
*:focus-visible {
    outline: 3px solid var(--color-primary-green);
    outline-offset: 2px;
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary-green);
    color: white;
    padding: var(--space-sm);
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}