/**
 * CFP (Call for Papers) - Premium Academic Design
 * 
 * Design Direction: Editorial Magazine + Refined Minimalism
 * - Typography: Elegant serif for headings, clean sans for body
 * - Color: Deep charcoal base with accent colors for urgency
 * - Layout: Generous whitespace, asymmetric grid, sophisticated cards
 * - Motion: Subtle, purposeful animations
 */

/* ===== CSS Variables ===== */
:root {
    /* Core Palette - matches blog's dark sidebar aesthetic */
    --cfp-bg: #f8f9fa;
    --cfp-card-bg: #ffffff;
    --cfp-text-primary: #1a1a2e;
    --cfp-text-secondary: #4a4a68;
    --cfp-text-muted: #8b8ba7;
    --cfp-border: #e8e8ef;
    --cfp-border-light: #f0f0f5;
    
    /* Accent Colors */
    --cfp-accent: #3d92c9;
    --cfp-accent-hover: #2d7db5;
    
    /* Urgency Spectrum */
    --cfp-urgent: #dc3545;
    --cfp-urgent-glow: rgba(220, 53, 69, 0.15);
    --cfp-warning: #fd7e14;
    --cfp-warning-glow: rgba(253, 126, 20, 0.12);
    --cfp-safe: #20c997;
    --cfp-safe-glow: rgba(32, 201, 151, 0.1);
    
    /* CCF Rank Colors */
    --ccf-a: #dc3545;
    --ccf-b: #fd7e14;
    --ccf-c: #3d92c9;
    --ccf-n: #8b8ba7;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.04), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.06), 0 5px 10px rgba(0,0,0,0.04);
    --shadow-hover: 0 14px 35px rgba(0,0,0,0.08), 0 6px 15px rgba(0,0,0,0.04);
    
    /* Typography */
    --font-display: 'Georgia', 'Times New Roman', serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2.5rem;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Container ===== */
.cfp-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg) var(--space-xl);
    animation: fadeInUp 0.5s ease-out;
}

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

/* ===== Header - Editorial Style ===== */
.cfp-header {
    text-align: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--cfp-border);
    position: relative;
}

.cfp-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--cfp-accent), var(--cfp-urgent));
    border-radius: 2px;
}

.cfp-header h1 {
    font-family: var(--font-display);
    font-size: 2.25rem;
    font-weight: 400;
    color: var(--cfp-text-primary);
    margin: 0 0 var(--space-sm);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.cfp-header h1 i {
    display: none; /* Hide icon for cleaner look */
}

.cfp-subtitle {
    font-family: var(--font-body);
    font-size: 1.05rem;
    color: var(--cfp-text-muted);
    margin: 0;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* ===== Search - Refined Input ===== */
.cfp-search {
    margin-bottom: var(--space-lg);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

#cfp-search-input {
    width: 100%;
    padding: 14px 20px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    border: 1px solid var(--cfp-border);
    border-radius: 50px;
    outline: none;
    background: var(--cfp-card-bg);
    color: var(--cfp-text-primary);
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

#cfp-search-input:hover {
    border-color: #d0d0dd;
}

#cfp-search-input:focus {
    border-color: var(--cfp-accent);
    box-shadow: var(--shadow-md), 0 0 0 3px rgba(61, 146, 201, 0.08);
}

#cfp-search-input::placeholder {
    color: var(--cfp-text-muted);
}

/* ===== Filters - Clean inline style ===== */
.cfp-filters {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    padding: var(--space-md) 0;
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    border: none;
    border-bottom: 1px solid var(--cfp-border-light);
}

.filter-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.filter-label {
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--cfp-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    min-width: 80px;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.filter-btn {
    padding: 6px 14px;
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid transparent;
    border-radius: 4px;
    background: transparent;
    color: var(--cfp-text-muted);
    cursor: pointer;
    transition: var(--transition-fast);
}

.filter-btn:hover {
    color: var(--cfp-text-primary);
}

.filter-btn.active {
    background: var(--cfp-text-primary);
    color: #fff;
}

.filter-btn.active:hover {
    background: var(--cfp-text-secondary);
}

/* ===== Loading State ===== */
.cfp-loading {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
    color: var(--cfp-text-muted);
    font-size: 0.95rem;
}

.cfp-loading i {
    display: block;
    font-size: 2rem;
    margin-bottom: var(--space-md);
    color: var(--cfp-accent);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* ===== Grid Layout ===== */
.cfp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-md);
}

/* ===== Card - Minimalist Editorial Design ===== */
.cfp-card {
    background: var(--cfp-card-bg);
    border-radius: 8px;
    padding: var(--space-lg);
    box-shadow: none;
    border: 1px solid var(--cfp-border);
    display: flex;
    flex-direction: column;
    transition: var(--transition-base);
    position: relative;
}

.cfp-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 3px;
    background: var(--cfp-text-muted);
    border-radius: 3px 0 0 3px;
    transition: var(--transition-fast);
}

.cfp-card:hover {
    border-color: var(--cfp-border);
    box-shadow: var(--shadow-sm);
}

/* Urgency Indicator - Subtle left border */
.cfp-card.urgency-critical::before {
    background: var(--cfp-urgent);
}

.cfp-card.urgency-warning::before {
    background: var(--cfp-warning);
}

.cfp-card.urgency-normal::before {
    background: var(--cfp-safe);
}

/* Card Header */
.cfp-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.cfp-card-title {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.cfp-card-title a {
    color: var(--cfp-text-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.cfp-card-title a:hover {
    color: var(--cfp-accent);
}

/* Badges - Minimal outline style */
.cfp-card-badges {
    display: flex;
    flex-shrink: 0;
    gap: 6px;
}

.cfp-card-rank {
    padding: 3px 10px;
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 600;
    background: transparent;
    border: 1.5px solid;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.cfp-card-sub {
    padding: 3px 10px;
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 500;
    background: transparent;
    border: 1.5px solid;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Full Name */
.cfp-card-fullname {
    margin: 0 0 var(--space-md);
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--cfp-text-muted);
    line-height: 1.4;
}

/* Countdown - Typography-focused, no background block */
.cfp-card-countdown {
    margin-bottom: var(--space-md);
    padding: 0;
    background: none;
}

.countdown-icon {
    display: none;
}

.countdown-value {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--cfp-text-primary);
    line-height: 1;
}

/* Urgency colors for countdown text only */
.urgency-critical .countdown-value {
    color: var(--cfp-urgent);
}

.urgency-warning .countdown-value {
    color: var(--cfp-warning);
}

/* Deadline Info */
.cfp-card-deadline {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--cfp-text-secondary);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.cfp-card-deadline i {
    color: var(--cfp-accent);
    font-size: 0.9rem;
}

.cfp-card-deadline .timezone {
    color: var(--cfp-text-muted);
    font-size: 0.8rem;
}

/* Info Section */
.cfp-card-info {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--cfp-text-muted);
    margin-bottom: var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.cfp-card-date,
.cfp-card-place {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.cfp-card-info i {
    width: 16px;
    color: var(--cfp-text-muted);
    opacity: 0.7;
}

/* Note - Simpler */
.cfp-card-note {
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: var(--cfp-text-muted);
    font-style: italic;
    padding: 0;
    margin-bottom: var(--space-sm);
}

.cfp-card-note i {
    display: none;
}

/* Actions - Text links, no buttons */
.cfp-card-actions {
    margin-top: auto;
    padding-top: var(--space-md);
    border-top: 1px solid var(--cfp-border-light);
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.cfp-card-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0;
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--cfp-text-muted);
    background: none;
    border: none;
    text-decoration: none;
    transition: var(--transition-fast);
}

.cfp-card-link:hover {
    color: var(--cfp-text-primary);
    text-decoration: none;
}

.cfp-card-link-secondary {
    color: var(--cfp-text-muted);
}

.cfp-card-link-secondary:hover {
    color: var(--cfp-text-primary);
}

/* ===== Empty State ===== */
.cfp-no-results {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
    color: var(--cfp-text-muted);
}

.cfp-no-results i {
    font-size: 3.5rem;
    margin-bottom: var(--space-md);
    display: block;
    opacity: 0.3;
}

.cfp-no-results p {
    font-size: 1rem;
    margin: 0;
}

/* ===== Error State ===== */
.cfp-error {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
    color: var(--cfp-urgent);
}

.cfp-error i {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    display: block;
}

.cfp-retry-btn {
    margin-top: var(--space-md);
    padding: 10px 24px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    background: var(--cfp-accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.cfp-retry-btn:hover {
    background: var(--cfp-accent-hover);
}

/* ===== Footer ===== */
.cfp-footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--cfp-border);
    text-align: center;
}

.cfp-footer p {
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: var(--cfp-text-muted);
    margin: 0;
}

.cfp-footer a {
    color: var(--cfp-accent);
    text-decoration: none;
    transition: var(--transition-fast);
}

.cfp-footer a:hover {
    color: var(--cfp-accent-hover);
    text-decoration: underline;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .cfp-container {
        padding: var(--space-md);
    }

    .cfp-header h1 {
        font-size: 1.75rem;
    }

    .cfp-subtitle {
        font-size: 0.95rem;
    }

    .cfp-search {
        max-width: 100%;
    }

    .cfp-filters {
        padding: var(--space-md);
    }

    .filter-group {
        flex-direction: column;
        align-items: flex-start;
    }

    .filter-label {
        margin-bottom: var(--space-xs);
    }

    .cfp-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .cfp-card {
        padding: var(--space-md);
    }

    .cfp-card-title {
        font-size: 1.1rem;
    }

    .countdown-value {
        font-size: 1.25rem;
    }

    .cfp-card-badges {
        flex-wrap: wrap;
    }
}

@media (min-width: 640px) and (max-width: 1023px) {
    .cfp-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) and (max-width: 1279px) {
    .cfp-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1280px) {
    .cfp-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ===== Print Styles ===== */
@media print {
    .cfp-search,
    .cfp-filters,
    .cfp-card-actions {
        display: none;
    }

    .cfp-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}