/* PCB Theme - Complete Design System */

/* ===== COLOR VARIABLES ===== */
:root {
    /* Core Colors */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111111;
    --pcb-green: #1a4d3a;
    --pcb-green-light: #2d6b4f;
    --pcb-green-dark: #0f2d20;
    --accent-green: #00ff88;
    --accent-blue: #0099ff;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    --border-primary: #333333;
    --border-secondary: #222222;
    --border-accent: var(--pcb-green);
    
    /* Status Colors */
    --success: #00ff88;
    --danger: #ff4444;
    --warning: #ffaa00;
    --info: #0099ff;

    /* Legacy support */
    --primary: var(--pcb-green);
    --primary-contrast: var(--text-primary);
    --bg: var(--bg-primary);
    --surface: var(--bg-secondary);
    --text: var(--text-primary);
}

/* ===== GLOBAL STYLES ===== */
* {
    box-sizing: border-box;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* PCB-inspired circuit patterns */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(90deg, var(--border-secondary) 1px, transparent 1px),
        linear-gradient(var(--border-secondary) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.1;
    pointer-events: none;
    z-index: -1;
}

/* ===== BUTTON SYSTEM ===== */
.btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-accent);
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    cursor: pointer;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 136, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    background: var(--pcb-green);
    border-color: var(--accent-green);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 255, 136, 0.3);
    color: var(--text-primary);
    text-decoration: none;
}

.btn:focus {
    outline: 2px solid var(--accent-green);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--pcb-green);
    border-color: var(--pcb-green-light);
    color: var(--text-primary);
}

.btn-primary:hover {
    background: var(--pcb-green-light);
    border-color: var(--accent-green);
    color: var(--text-primary);
}

.btn-secondary {
    background: var(--bg-tertiary);
    border-color: var(--border-primary);
}

.btn-secondary:hover {
    background: var(--pcb-green-dark);
    border-color: var(--pcb-green);
}

.btn-outline-primary {
    background: transparent;
    border-color: var(--pcb-green);
    color: var(--pcb-green);
}

.btn-outline-primary:hover {
    background: var(--pcb-green);
    color: var(--text-primary);
}

.btn-outline-secondary {
    background: var(--bg-tertiary);
    border-color: var(--border-primary);
    color: var(--text-secondary);
}

.btn-outline-secondary:hover {
    background: var(--pcb-green);
    border-color: var(--pcb-green-light);
    color: var(--text-primary);
}

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

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

.btn-close {
    filter: invert(1);
}

/* ===== CONTAINER SYSTEM ===== */
.modern-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-accent);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.modern-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--pcb-green), var(--accent-green), var(--pcb-green));
}

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-accent);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    position: relative;
    transition: all 0.3s ease;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--pcb-green), var(--accent-green), var(--pcb-green));
    background-size: 200% 100%;
    animation: pcb-glow 3s ease-in-out infinite;
}

@keyframes pcb-glow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 255, 136, 0.15);
    border-color: var(--accent-green);
}

.container {
    max-width: 1200px;
}

/* ===== FORM SYSTEM ===== */
.form-control {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    border-radius: 6px;
    padding: 0.75rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    background: var(--bg-tertiary);
    border-color: var(--pcb-green);
    box-shadow: 0 0 0 0.2rem rgba(26, 77, 58, 0.25);
    color: var(--text-primary);
    outline: none;
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-label i {
    color: var(--pcb-green);
    width: 16px;
}

.form-text {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-check-input:checked {
    background-color: var(--pcb-green);
    border-color: var(--pcb-green);
}

.form-check-label {
    color: var(--text-secondary);
}

/* ===== INFO BOXES ===== */
.info-box {
    background: rgba(26, 77, 58, 0.2);
    border: 1px solid var(--pcb-green);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.info-box i {
    color: var(--pcb-green);
    margin-top: 0.125rem;
    flex-shrink: 0;
}

/* ===== HEADER SYSTEM ===== */
.page-header {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--pcb-green-dark) 100%);
    border-bottom: 2px solid var(--pcb-green);
    padding: 2rem 0;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, var(--pcb-green) 2px, transparent 2px),
        radial-gradient(circle at 80% 50%, var(--pcb-green) 1px, transparent 1px);
    background-size: 100px 50px, 150px 75px;
    opacity: 0.3;
}

.page-title {
    color: var(--text-primary);
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.3);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

/* Auth page specific titles */
.auth-title {
    color: var(--text-primary);
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    color: var(--text-secondary);
    margin: 0;
}

/* ===== NAVBAR SYSTEM ===== */
.navbar {
    background: var(--bg-secondary) !important;
    border-bottom: 1px solid var(--border-accent);
    backdrop-filter: blur(10px);
    padding: 0.75rem 0;
}

.navbar-brand {
    color: var(--text-primary) !important;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.navbar-brand img {
    border-radius: 4px;
    padding: 2px;
}

/* ===== ICON SYSTEM ===== */
.icon-circle {
    width: 60px;
    height: 60px;
    background: var(--pcb-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.icon-circle.success {
    background: var(--success);
}

.icon-circle.info {
    background: var(--info);
}

.icon-circle.danger {
    background: var(--danger);
}

.icon-circle.warning {
    background: var(--warning);
}

/* ===== ALERT SYSTEM ===== */
.alert {
    border-radius: 6px;
    border: 1px solid;
    padding: 1rem;
    margin-bottom: 1rem;
}

.alert-success {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--success);
    color: var(--success);
}

.alert-info {
    background: rgba(0, 153, 255, 0.1);
    border-color: var(--info);
    color: var(--info);
}

.alert-danger {
    background: rgba(255, 68, 68, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

.alert-warning {
    background: rgba(255, 170, 0, 0.1);
    border-color: var(--warning);
    color: var(--warning);
}

/* ===== MODAL SYSTEM ===== */
.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-accent);
    border-radius: 12px;
}

.modal-header {
    border-bottom: 1px solid var(--border-primary);
    background: var(--bg-tertiary);
    border-radius: 12px 12px 0 0;
}

.modal-title {
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-title i {
    color: var(--pcb-green);
}

.modal-footer {
    border-top: 1px solid var(--border-primary);
    background: var(--bg-tertiary);
    border-radius: 0 0 12px 12px;
}

/* ===== FOOTER SYSTEM ===== */
.site-footer {
    background: var(--bg-secondary);
    border-top: 2px solid var(--pcb-green);
    color: var(--text-secondary);
    margin-top: auto;
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--pcb-green), var(--accent-green), var(--pcb-green));
    background-size: 200% 100%;
    animation: pcb-glow 3s ease-in-out infinite;
}

.footer-content {
    position: relative;
    z-index: 1;
}

.footer-brand {
    color: var(--text-primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand i {
    color: var(--pcb-green);
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.site-footer .nav-link {
    color: var(--text-secondary) !important;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    position: relative;
}

.site-footer .nav-link:hover {
    color: var(--accent-green) !important;
    background: rgba(26, 77, 58, 0.1);
    transform: translateY(-1px);
    text-decoration: none;
}

.footer-social {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-social a {
    color: var(--text-muted);
    font-size: 1.25rem;
    transition: all 0.3s ease;
    padding: 0.5rem;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.footer-social a:hover {
    color: var(--accent-green);
    background: rgba(26, 77, 58, 0.1);
    transform: translateY(-2px);
}

/* ===== MAIN CONTENT ===== */
main {
    background: var(--bg-primary);
    min-height: calc(100vh - 140px);
}

/* ===== LINKS ===== */
.link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.link:hover {
    color: var(--accent-green);
    text-decoration: none;
}

.link i {
    font-size: 0.75rem;
}

/* ===== TEXT UTILITIES ===== */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted) !important; }
.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-warning { color: var(--warning) !important; }
.text-info { color: var(--info) !important; }

/* ===== LAYOUT UTILITIES ===== */
.w-100 { width: 100% !important; }
.h-100 { height: 100% !important; }
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }
.align-items-center { align-items: center !important; }
.justify-content-center { justify-content: center !important; }
.gap-1 { gap: 0.25rem !important; }
.gap-2 { gap: 0.5rem !important; }
.gap-3 { gap: 1rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.my-5 { margin-top: 3rem !important; margin-bottom: 3rem !important; }

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .navbar-brand span {
        display: none;
    }
    
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .page-header {
        padding: 1.5rem 0;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .modern-container, .card {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
    }

    .footer-social {
        justify-content: center;
    }
}

/* Small screen specific responsive styles */
@media (max-width: 480px) {
    .d-flex.justify-content-between {
        flex-direction: column !important;
        text-align: center;
    }
}

/* Footer brand alignment on smaller screens */
@media (max-width: 767px) {
    .footer-brand {
        justify-content: center;
    }
}

/* ===== ENHANCED FOOTER STYLES ===== */
.footer-brand-name {
    color: var(--accent-green) !important;
}

.footer-copy {
    color: var(--text-secondary) !important;
    font-size: 0.9rem !important;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.footer-link:hover {
    color: var(--accent-green) !important;
    text-shadow: 0 0 5px rgba(0, 255, 136, 0.6);
}

.social-link {
    display: inline-flex;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--text-muted);
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--accent-green);
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.2);
    transform: translateY(-2px);
    color: var(--accent-green);
}

.footer-tagline {
    font-size: 0.8rem;
    color: var(--accent-green) !important;
    margin: 0;
    text-shadow: 0 0 5px rgba(0, 255, 136, 0.6);
    font-family: 'Consolas', 'Monaco', 'Lucida Console', monospace;
}