/* ============================================
   PREMIUM COLOR SYSTEM
   ============================================ */
:root {
    /* Primary Gradient */
    --primary-start: #667eea;
    --primary-end: #764ba2;

    /* Secondary Gradient */
    --secondary-start: #f093fb;
    --secondary-end: #f5576c;

    /* Success Gradient */
    --success-start: #4facfe;
    --success-end: #00f2fe;

    /* Warning Gradient */
    --warning-start: #fa709a;
    --warning-end: #fee140;

    /* Info Gradient */
    --info-start: #30cfd0;
    --info-end: #330867;

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   BASE STYLES
   ============================================ */
html {
    font-size: 14px;
    scroll-behavior: smooth;
    position: relative;
    min-height: 100%;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

body {
    margin-bottom: 60px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    background-attachment: fixed;
    min-height: 100vh;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

/* ============================================
   GLASSMORPHISM EFFECTS
   ============================================ */
.glass-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-lg);
    border-radius: 16px;
    transition: all var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.glass-navbar {
    background: rgba(102, 126, 234, 0.95) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-light {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.glass-dark {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
}

/* ============================================
   PREMIUM SHADOWS
   ============================================ */
.shadow-premium {
    box-shadow: var(--shadow-xl);
}

.shadow-glow {
    box-shadow: 0 0 30px rgba(102, 126, 234, 0.4);
}

.shadow-glow-success {
    box-shadow: 0 0 30px rgba(79, 172, 254, 0.4);
}

.shadow-glow-warning {
    box-shadow: 0 0 30px rgba(250, 112, 154, 0.4);
}

/* ============================================
   GRADIENT BACKGROUNDS
   ============================================ */
.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-start) 0%, var(--primary-end) 100%);
}

.bg-gradient-secondary {
    background: linear-gradient(135deg, var(--secondary-start) 0%, var(--secondary-end) 100%);
}

.bg-gradient-success {
    background: linear-gradient(135deg, var(--success-start) 0%, var(--success-end) 100%);
}

.bg-gradient-warning {
    background: linear-gradient(135deg, var(--warning-start) 0%, var(--warning-end) 100%);
}

.bg-gradient-info {
    background: linear-gradient(135deg, var(--info-start) 0%, var(--info-end) 100%);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   ANIMATION UTILITY CLASSES
   ============================================ */
.animate-fade-in {
    animation: fadeIn 0.6s ease;
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s ease;
}

.animate-slide-left {
    animation: slideInLeft 0.6s ease;
}

.animate-slide-right {
    animation: slideInRight 0.6s ease;
}

.animate-scale-in {
    animation: scaleIn 0.5s ease;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* Reveal on Scroll */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   CUSTOM SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-start) 0%, var(--primary-end) 100%);
    border-radius: 10px;
    border: 2px solid #f1f1f1;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-end) 0%, var(--primary-start) 100%);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-start) #f1f1f1;
}

/* ============================================
   ENHANCED CARDS
   ============================================ */
.card {
    border: none;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-start) 0%, var(--primary-end) 100%);
    color: white;
    border: none;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* ============================================
   ENHANCED BUTTONS
   ============================================ */
.btn {
    border-radius: 10px;
    font-weight: 500;
    padding: 0.5rem 1.5rem;
    transition: all var(--transition-base);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-start) 0%, var(--primary-end) 100%);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-start) 0%, var(--success-end) 100%);
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 172, 254, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-start) 0%, var(--warning-end) 100%);
    box-shadow: 0 4px 15px rgba(250, 112, 154, 0.3);
    color: white;
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(250, 112, 154, 0.4);
    color: white;
}

/* ============================================
   ENHANCED FORMS
   ============================================ */
.form-control, .form-select {
    border-radius: 10px;
    border: 2px solid #e2e8f0;
    padding: 0.75rem 1rem;
    transition: all var(--transition-base);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-start);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    transform: translateY(-2px);
}

.form-label {
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

/* ============================================
   ENHANCED ALERTS
   ============================================ */
.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-md);
    animation: slideInRight 0.5s ease;
}

.alert-success {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.1) 0%, rgba(0, 242, 254, 0.1) 100%);
    border-left: 4px solid var(--success-start);
    color: #0c5460;
}

.alert-danger {
    background: linear-gradient(135deg, rgba(240, 147, 251, 0.1) 0%, rgba(245, 87, 108, 0.1) 100%);
    border-left: 4px solid var(--secondary-end);
    color: #721c24;
}

.alert-warning {
    background: linear-gradient(135deg, rgba(250, 112, 154, 0.1) 0%, rgba(254, 225, 64, 0.1) 100%);
    border-left: 4px solid var(--warning-start);
    color: #856404;
}

.alert-info {
    background: linear-gradient(135deg, rgba(48, 207, 208, 0.1) 0%, rgba(51, 8, 103, 0.1) 100%);
    border-left: 4px solid var(--info-start);
    color: #004085;
}

/* ============================================
   ENHANCED TOASTS
   ============================================ */
.toast {
    border: none;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
    animation: slideInRight 0.5s ease;
}

.toast-header {
    border-bottom: none;
    border-radius: 12px 12px 0 0;
    font-weight: 600;
}

.toast-header.bg-success {
    background: linear-gradient(135deg, var(--success-start) 0%, var(--success-end) 100%) !important;
}

.toast-header.bg-danger {
    background: linear-gradient(135deg, var(--secondary-start) 0%, var(--secondary-end) 100%) !important;
}

.toast-header.bg-warning {
    background: linear-gradient(135deg, var(--warning-start) 0%, var(--warning-end) 100%) !important;
}

.toast-header.bg-info {
    background: linear-gradient(135deg, var(--info-start) 0%, var(--info-end) 100%) !important;
}

/* ============================================
   PAGE LOADER
   ============================================ */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-start) 0%, var(--primary-end) 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    transition: opacity 0.5s, visibility 0.5s;
}

.page-loader.loaded {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: rotate 1s linear infinite;
}

.loader-text {
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 1.5rem;
    animation: pulse 2s ease-in-out infinite;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-gradient-primary {
    background: linear-gradient(135deg, var(--primary-start) 0%, var(--primary-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-success {
    background: linear-gradient(135deg, var(--success-start) 0%, var(--success-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-warning {
    background: linear-gradient(135deg, var(--warning-start) 0%, var(--warning-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hover-scale {
    transition: transform var(--transition-base);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.hover-lift {
    transition: transform var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-5px);
}

.cursor-pointer {
    cursor: pointer;
}

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */
@media (max-width: 768px) {
    .card {
        border-radius: 12px;
    }

    .btn {
        padding: 0.5rem 1rem;
    }
}

/* ============================================
   FOOTER ENHANCEMENT
   ============================================ */
footer {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-top: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.05);
}

footer a {
    color: var(--primary-start);
    transition: all var(--transition-base);
}

footer a:hover {
    color: var(--primary-end);
    transform: translateY(-2px);
}