/* AquaBridge - Water Management Research Platform Styles */

:root {
    /* Water Theme Colors */
    --primary: #1e88e5;       /* Water Blue */
    --primary-dark: #1565c0;    /* Deep Water Blue */
    --primary-light: #e3f2fd;    /* Light Blue Tint */
    --secondary: #00695c;      /* Water Green */
    --secondary-light: #e8f5e9; /* Light Green */
    --accent: #2e7d32;       /* Fresh Green */
    --dark: #0d1b2e;        /* Deep Navy */
    --dark-800: #1a237e;     /* Navy Blue */
    --dark-600: #1e3a5f;     /* Mid Navy */
    --gray: #546e7a;        /* Blue Gray */
    --gray-light: #90a4ae;     /* Light Gray-Blue */
    --gray-100: #ecf0f1;     /* Off White */
    --gray-50: #f5f7f8;      /* Near White */
    --white: #ffffff;
    --success: #2e7d32;       /* Green */
    --warning: #f9a825;       /* Amber */
    --danger: #c62828;        /* Red */
    --shadow-sm: 0 1px 2px rgba(30,64,128,0.08);
    --shadow: 0 4px 6px -1px rgba(30,64,128,0.12);
    --shadow-lg: 0 10px 15px -3px rgba(30,64,128,0.12);
    --shadow-xl: 0 20px 25px -5px rgba(30,64,128,0.12);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Calibri', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.text-center { text-align: center; }

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Times New Roman', Times, serif;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    color: var(--gray);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.1);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-100);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-600);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(rgba(30, 100, 200, 0.7), rgba(0, 105, 148, 0.5)), url('https://images.unsplash.com/photo-1559827264684-d57e98e71?w=1600&q=80') center/cover no-repeat;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
}

.wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
}

.wave-1 {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 100'%3E%3Cpath fill='%23ffffff' fill-opacity='0.3' d='M0,50 C360,100 720,0 1080,50 C1260,75 1380,50 1440,50 L1440,100 L0,100 Z'/%3E%3C/svg%3E") repeat-x;
    animation: wave 8s ease-in-out infinite;
}

.wave-2 {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 100'%3E%3Cpath fill='%23ffffff' fill-opacity='0.5' d='M0,70 C320,20 640,90 960,50 C1200,20 1360,70 1440,70 L1440,100 L0,100 Z'/%3E%3C/svg%3E") repeat-x;
    animation: wave 6s ease-in-out infinite reverse;
    bottom: 10px;
}

.wave-3 {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 100'%3E%3Cpath fill='%23ffffff' fill-opacity='0.8' d='M0,80 C400,30 800,80 1200,40 C1350,25 1420,60 1440,80 L1440,100 L0,100 Z'/%3E%3C/svg%3E") repeat-x;
    animation: wave 10s ease-in-out infinite;
    bottom: 20px;
}

@keyframes wave {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(-50px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    color: var(--white);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: var(--white);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    color: var(--white);
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    font-family: 'Playfair Display', serif;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Sections */
.section-title {
    text-align: center;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 3rem;
}

/* Features */
.features {
    padding: 6rem 0;
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 48px;
    height: 48px;
    color: var(--primary);
    margin-bottom: 1rem;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.feature-card p {
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.card-link {
    color: var(--primary);
    font-weight: 500;
    font-size: 0.9rem;
}

/* Research Highlight */
.research-highlight {
    padding: 6rem 0;
}

.highlight-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.highlight-text .tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.highlight-list {
    list-style: none;
    margin: 1.5rem 0;
}

.highlight-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--gray);
}

.highlight-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.research-card-stack {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.r-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
    transition: var(--transition);
}

.r-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-lg);
}

.r-category {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.2rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.r-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.r-date {
    font-size: 0.875rem;
    color: var(--gray-light);
}

/* Management Models */
.management-models {
    padding: 6rem 0;
    background: var(--gray-50);
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.model-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

.model-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.model-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.model-type {
    background: var(--primary);
    color: var(--white);
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.model-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0;
}

.model-card p {
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.model-metrics {
    display: flex;
    gap: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-100);
    font-size: 0.875rem;
}

.model-metrics strong {
    color: var(--dark);
}

/* CTA Section */
.cta-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #0c4a6e 0%, #0ea5e9 100%);
    color: var(--white);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.cta-content p {
    color: rgba(255,255,255,0.9);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--gray-light);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-brand p {
    font-size: 0.95rem;
}

.footer-links h4 {
    color: var(--white);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--gray-light);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--dark-800);
    font-size: 0.875rem;
}

.footer-bottom-links {
    display: flex;
    gap: 2rem;
}

.footer-bottom-links a {
    color: var(--gray-light);
    text-decoration: none;
    transition: var(--transition);
}

.footer-bottom-links a:hover {
    color: var(--primary);
}

/* Page Header */
.page-header {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, #0c4a6e 0%, #0ea5e9 100%);
    color: var(--white);
    text-align: center;
}

.page-header h1 {
    color: var(--white);
    margin-bottom: 1rem;
}

.page-header p {
    color: rgba(255,255,255,0.9);
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* Content Sections */
.content-section {
    padding: 4rem 0;
}

.content-section:nth-child(even) {
    background: var(--gray-50);
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.content-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

.content-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.card-body {
    padding: 1.5rem;
}

.card-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.card-body h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.card-body p {
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.card-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--gray-light);
}

/* Resources Grid */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.resource-item {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
    text-align: center;
}

.resource-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: var(--primary);
}

.resource-item h3 {
    margin-bottom: 0.5rem;
}

.resource-item p {
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

/* Implementation Section */
.implementation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.implementation-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
}

.implementation-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.implementation-card ul {
    list-style: none;
    padding: 0;
}

.implementation-card li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--gray);
}

.implementation-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* Responsive */
@media (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .highlight-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* Utility Classes */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* Research Page Specific Styles */
.research-stats {
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.research-controls {
    background: var(--gray-50);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
}

.research-controls input,
.research-controls select {
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
}

.research-controls input:focus,
.research-controls select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.paper-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.paper-details {
    padding-top: 1rem;
    border-top: 1px solid var(--gray-100);
    color: var(--gray);
}

.paper-details a {
    color: var(--primary);
    text-decoration: none;
}

.paper-details a:hover {
    text-decoration: underline;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-outline {
    background: transparent;
    color: var(--dark-600);
    border: 1px solid var(--gray-100);
}

.btn-outline:hover {
    background: var(--gray-50);
    border-color: var(--primary);
    color: var(--primary);
}

/* Utility Classes */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* Responsive fixes for research controls */
@media (max-width: 768px) {
    .research-controls > div {
        flex-direction: column;
    }
    
    .research-controls input,
    .research-controls select {
        width: 100%;
    }
}

/* Submission Form Styles */
.submission-form {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
}

.form-section {
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--gray-100);
}

.form-section:last-of-type {
    border-bottom: none;
}

.form-section h3 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-600);
}

.form-group small {
    margin-top: 0.25rem;
    color: var(--gray);
    font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem;
    border: 1px solid var(--gray-100);
    border-radius: var(--radius);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    cursor: pointer;
    line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    cursor: pointer;
    flex-shrink: 0;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--gray-100);
}

/* Submission Info Card */
.submission-info .implementation-card {
    border-left: 4px solid var(--primary);
}

.submission-info ul {
    list-style: none;
    padding: 0;
}

.submission-info li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.submission-info li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* Required field indicator */
label[for]::after {
    content: '';
}

label[for="title"]::after,
label[for="authors"]::after,
label[for="year"]::after,
label[for="journal"]::after,
label[for="category"]::after,
label[for="abstract"]::after,
label[for="keywords"]::after,
label[for="doi"]::after,
label[for="open_access_url"]::after,
label[for="contact_name"]::after,
label[for="contact_email"]::after {
    content: ' *';
    color: var(--danger);
}

@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .submission-form {
        padding: 1.5rem;
    }
}

/* Tab Styles */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--gray-100);
    padding-bottom: 0;
}

.tab {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: -2px;
}

.tab:hover {
    color: var(--primary);
    border-bottom-color: var(--primary-light);
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* Badge styles for paper cards */
.content-card .card-body > .card-tag {
    margin-right: 0.25rem;
    margin-bottom: 0.5rem;
    display: inline-block;
}

.content-card .card-body > .card-tag:first-child {
    margin-right: 0.5rem;
}

/* Success/Warning/Info colors for badges */
.card-tag[style*="background: #d1fae5"] {
    background: #d1fae5 !important;
    color: #065f46 !important;
}

.card-tag[style*="background: #fef3c7"] {
    background: #fef3c7 !important;
    color: #92400e !important;
}

/* Contact info in paper details */
.paper-details small {
    color: var(--gray);
    font-size: 0.8rem;
}

/* Admin Panel Styles */
.admin-controls {
    background: var(--gray-50);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
}

.admin-controls h2 {
    margin: 0;
}

/* Submission Review Card */
.submission-review-card {
    background: var(--white);
    border: 2px solid var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.submission-review-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
}

.submission-review-card.approved {
    border-color: var(--success);
    background: #f0fdf4;
}

.submission-review-card.rejected {
    border-color: var(--danger);
    background: #fef2f2;
}

.submission-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    gap: 1rem;
}

.submission-header h3 {
    margin: 0;
    flex: 1;
}

.submission-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.submission-status.pending {
    background: #fef3c7;
    color: #92400e;
}

.submission-status.approved {
    background: #d1fae5;
    color: #065f46;
}

.submission-status.rejected {
    background: #fee2e2;
    color: #991b1b;
}

.submission-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1rem 0;
    font-size: 0.875rem;
    color: var(--gray);
}

.submission-meta span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.submission-abstract {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 1rem 0;
    padding: 1rem;
    background: var(--gray-50);
    border-radius: var(--radius);
}

.submission-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.keyword-tag {
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.submission-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-100);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 1rem;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-100);
}

.modal-header h2 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--gray);
    line-height: 1;
}

.modal-close:hover {
    color: var(--dark);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    padding: 1.5rem;
    border-top: 1px solid var(--gray-100);
}

.modal-section {
    margin-bottom: 1.5rem;
}

.modal-section h4 {
    margin-bottom: 0.5rem;
    color: var(--dark-600);
}

.modal-section p {
    color: var(--gray);
    line-height: 1.5;
}

.modal-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 768px) {
    .submission-header {
        flex-direction: column;
    }
    
    .modal-content {
        max-height: 95vh;
    }
}

/* Notification Animations */
@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}