/* Trema Academic - Scholarly Color Palette */
/* Professional academic purples and refined tones */
/* WCAG AA compliant with enhanced contrast */

@import url('https://fonts.googleapis.com/css2?family=Merriweather:ital,wght@0,400;0,700;1,400&family=Open+Sans:wght@400;600;700&display=swap');

:root {
    /* Harmonized Trema Academic Colors - Scholarly Theme */
    /* Based on main brand with refined purple-sage variations */
    
    /* Primary Colors - Academic sophistication from brand sage to purple */
    --primary-dark: #322c38;        /* Shade: deep scholarly purple-gray */
    --primary-medium: #473f4d;      /* Tone: refined purple-sage */
    --primary-accent: #625a6b;      /* Tint: soft lavender-gray */
    --primary-light: #f3f1f4;       /* Parchment off-white */
    --primary-neutral: #958e9a;     /* Tone: muted lavender gray */
    
    /* Enhanced Text Colors with Opacity for Visibility */
    --text-dark: rgba(26, 26, 26, 0.95);      /* High opacity for primary text */
    --text-medium: rgba(64, 58, 70, 0.87);    /* Scholarly dark text with purple hint */
    --text-light: rgba(255, 255, 255, 0.98);  /* High opacity white */
    --text-secondary: rgba(74, 74, 74, 0.7);  /* Lower opacity for secondary */
    
    /* Accent Colors - Scholarly refinement with brand harmony */
    --accent-purple: #4d3d5e;       /* Deep wisdom purple */
    --accent-burgundy: #5e3d4d;     /* Deep academic burgundy */
    --accent-sage: #3d5548;         /* Deep scholarly sage */
    
    /* Semantic Colors - High Contrast */
    --success-color: #2d5e48;       /* Deep sage success */
    --info-color: #3d3d5e;          /* Deep academic purple info */
    --warning-color: #9d6e20;       /* Deep scholarly gold warning */
    --error-color: #8b2e3d;         /* Deep burgundy error */
    
    /* Fonts */
    --font-serif: 'Merriweather', Georgia, serif;
    --font-sans: 'Open Sans', Arial, sans-serif;
}

body {
    font-family: var(--font-sans);
    color: var(--text-dark);
}

p {
    color: var(--text-medium);
    line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    color: var(--text-dark);
}

.slogan {
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--text-medium);
}

/* Override main styles with academic-specific colors */
.navbar {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-medium) 100%);
}

.hero {
    background: linear-gradient(135deg, var(--primary-medium) 0%, var(--accent-purple) 100%);
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 0;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1,
.hero h2,
.page-hero h1,
.page-hero h2 {
    color: #ffffff !important;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7);
}

.hero p,
.page-hero p {
    color: rgba(255, 255, 255, 0.98) !important;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.7);
}

/* Enhanced Academic Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--accent-purple) 0%, var(--primary-medium) 100%);
    color: #ffffff;
    border: 2px solid var(--accent-purple);
    box-shadow: 0 2px 8px rgba(77, 61, 94, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-burgundy) 0%, var(--accent-sage) 100%);
    border-color: var(--accent-sage);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 6px 20px rgba(77, 61, 94, 0.4);
    color: #ffffff;
}

.btn-secondary {
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 100%);
    color: var(--accent-purple);
    border: 2px solid var(--accent-purple);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-burgundy) 100%);
    color: #ffffff;
    border-color: var(--accent-sage);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 6px 20px rgba(77, 61, 94, 0.3);
}

.service-card:hover,
.stat-card:hover {
    border-color: var(--accent-purple);
    box-shadow: 0 8px 20px rgba(123, 104, 166, 0.2);
}

footer {
    background: var(--primary-dark);
}

/* Form elements */
input:focus,
textarea:focus,
select:focus {
    border-color: var(--accent-purple);
    outline: none;
    box-shadow: 0 0 0 3px rgba(123, 104, 166, 0.1);
}

/* Links */
a:hover {
    color: var(--accent-purple);
}

/* Active navigation */
.nav-links a.active {
    color: var(--accent-sage);
}

/* Academic-specific styling */
.faq-item {
    border-left: 4px solid var(--accent-purple);
}

.privacy-section {
    border-top: 2px solid var(--primary-neutral);
}

/* Professional touch */
h1, h2, h3 {
    color: var(--primary-dark);
}

/* Section backgrounds */
.content-section:nth-child(even) {
    background: var(--primary-light);
}

/* Team member cards */
.team-card:hover {
    border-color: var(--accent-purple);
    box-shadow: 0 6px 15px rgba(123, 104, 166, 0.15);
}

/* Responsive Design - Trema Academic */

/* Mobile devices (max-width: 768px) */
@media (max-width: 768px) {
    /* Footer centering */
    .footer-section {
        text-align: center;
    }
    
    .footer-section h3,
    .footer-section h4 {
        text-align: center;
    }
    
    .footer-section h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-section ul {
        text-align: center;
    }
    
    .footer-section address {
        text-align: center;
    }
    
    .footer-section address p {
        justify-content: center;
    }
    
    /* Search right align */
    .search-wrapper {
        margin-left: auto;
        margin-right: 0;
    }
    
    /* Research database */
    .research-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    
    .research-card {
        padding: 1.25rem;
    }
    
    /* Citation generator */
    .citation-form {
        padding: 1.25rem;
    }
    
    /* Academic calendar */
    .calendar-grid {
        grid-template-columns: 1fr;
    }
    
    .event-card {
        padding: 1rem;
    }
    
    /* Publication tracker */
    .publication-metrics {
        flex-direction: column;
        gap: 1rem;
    }
    
    .metric-card {
        width: 100%;
    }
    
    /* FAQ items */
    .faq-item {
        padding: 1.25rem;
    }
    
    /* Privacy sections */
    .privacy-section {
        padding: 1.5rem 1rem;
    }
    
    /* Team cards */
    .team-grid {
        grid-template-columns: 1fr;
    }
}

/* Small mobile devices (max-width: 480px) */
@media (max-width: 480px) {
    .research-card,
    .event-card,
    .faq-item {
        padding: 1rem;
    }
    
    .citation-form {
        padding: 1rem;
    }
    
    .privacy-section {
        padding: 1.25rem 0.75rem;
    }
    
    /* Typography adjustments */
    .research-card h3,
    .event-card h3 {
        font-size: 1.1rem;
    }
}

/* Large desktop screens (min-width: 1440px) */
@media (min-width: 1440px) {
    .research-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .calendar-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}