/* ======================================================
   COMPONENT LIBRARY
   ======================================================
   Reusable UI components based on the modern design language
   ====================================================== */

/* ======================================================
   MODERN BUTTONS
   ====================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    font-family: var(--font-family-base);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
    line-height: var(--leading-tight);
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    user-select: none;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(16, 169, 225, 0.1);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--text-xs);
    gap: var(--spacing-1);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--text-base);
}

/* Button Variants */
.btn-primary {
    background: var(--primary);
    color: var(--color-text-inverse);
    border-color: var(--primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--color-bg-secondary);
    border-color: var(--color-border-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-accent:hover:not(:disabled) {
    background: #0891d3;
    border-color: #0891d3;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background: var(--color-success);
    color: var(--color-text-inverse);
    border-color: var(--color-success);
}

.btn-success:hover:not(:disabled) {
    background: var(--green-dark);
    border-color: var(--green-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-warning {
    background: var(--orange);
    color: var(--color-text-inverse);
    border-color: var(--orange);
}

.btn-warning:hover:not(:disabled) {
    background: var(--orange-dark);
    border-color: var(--orange-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background: var(--color-error);
    color: var(--color-text-inverse);
    border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
    background: #b91c1c;
    border-color: #b91c1c;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Button States */
.btn:disabled,
.btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn.loading {
    opacity: 0.8;
    pointer-events: none;
}

/* Button Icons */
.btn-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.btn-sm .btn-icon {
    width: 14px;
    height: 14px;
}

.btn-lg .btn-icon {
    width: 18px;
    height: 18px;
}

/* ======================================================
   MODERN CARDS
   ====================================================== */

.card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

/* Card Header */
.card-header {
    margin-bottom: var(--spacing-6);
    padding-bottom: var(--spacing-4);
    border-bottom: 1px solid var(--color-border);
}

.card-header h2,
.card-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin: 0;
    color: var(--primary);
    font-size: var(--text-xl);
    font-weight: var(--font-weight-semibold);
}

.card-header-icon {
    width: 20px;
    height: 20px;
    color: var(--primary-light);
    flex-shrink: 0;
}

/* Card Content */
.card-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

/* Card Actions */
.card-actions {
    display: flex;
    gap: var(--spacing-3);
    justify-content: flex-end;
    margin-top: var(--spacing-6);
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--color-border);
}

/* Card Variations */
.card-flat {
    box-shadow: none;
    border: 1px solid var(--color-border);
}

.card-elevated {
    box-shadow: var(--shadow-xl);
}

.card-gradient {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--color-text-inverse);
    border-color: var(--primary);
}

.card-gradient .card-header h2,
.card-gradient .card-header h3 {
    color: var(--color-text-inverse);
}

/* ======================================================
   MODERN FORMS
   ====================================================== */

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-4);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
}

.form-input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-elevated);
    font-family: var(--font-family-base);
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--color-text);
    transition: all var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(16, 169, 225, 0.1);
}

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

.form-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--color-bg-secondary);
}

/* Form Input Variations */
.form-input-sm {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--text-xs);
}

.form-input-lg {
    padding: var(--spacing-4) var(--spacing-5);
    font-size: var(--text-base);
}

/* Input States */
.form-input.error {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-input.success {
    border-color: var(--color-success);
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.1);
}

/* Form Hints */
.form-hint {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}

.form-error {
    font-size: var(--text-xs);
    color: var(--color-error);
}

/* ======================================================
   BADGES & CHIPS
   ====================================================== */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-medium);
    line-height: var(--leading-tight);
    white-space: nowrap;
}

/* Badge Variants */
.badge-primary {
    background: rgba(26, 43, 60, 0.1);
    color: var(--primary);
}

.badge-success {
    background: rgba(22, 163, 74, 0.1);
    color: var(--color-success);
}

.badge-warning {
    background: rgba(249, 115, 22, 0.1);
    color: var(--orange);
}

.badge-error {
    background: rgba(220, 38, 38, 0.1);
    color: var(--color-error);
}

.badge-info {
    background: rgba(16, 169, 225, 0.1);
    color: var(--primary-light);
}

.badge-secondary {
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
}

/* Badge with Icon */
.badge-icon {
    width: 12px;
    height: 12px;
}

/* ======================================================
   MODERN TIMELINE
   ====================================================== */

.timeline {
    position: relative;
    padding: var(--spacing-2) var(--spacing-2);
    margin: var(--spacing-2) calc(-1 * var(--spacing-2));
    max-height: 400px;
    overflow-y: auto;
    scroll-behavior: smooth;
}

/* Custom scrollbar for timeline */
.timeline::-webkit-scrollbar {
    width: 6px;
}

.timeline::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
}

.timeline::-webkit-scrollbar-thumb {
    background: var(--color-border-secondary);
    border-radius: var(--radius-sm);
    transition: background var(--transition-base);
}

.timeline::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}

.timeline-item {
    display: flex;
    gap: var(--spacing-4);
    padding: var(--spacing-4) 0;
    position: relative;
}

.timeline-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 8px;
    top: calc(var(--spacing-8));
    bottom: calc(-1 * var(--spacing-4));
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-light), rgba(16, 169, 225, 0.3));
}

.timeline-marker {
    width: 16px;
    height: 16px;
    background: var(--primary-light);
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: var(--spacing-1);
    box-shadow: 0 0 0 4px rgba(16, 169, 225, 0.1);
}

.timeline-marker.system {
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(26, 43, 60, 0.1);
}

.timeline-marker.success {
    background: var(--color-success);
    box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.1);
}

.timeline-marker.warning {
    background: var(--orange);
    box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.1);
}

.timeline-content {
    flex: 1;
    padding-left: var(--spacing-2);
}

.timeline-time {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-1);
}

.timeline-description {
    font-size: var(--text-sm);
    color: var(--color-text);
    line-height: var(--leading-normal);
}

.timeline-author {
    display: inline-block;
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-medium);
    margin-left: var(--spacing-2);
}

.timeline-author.system {
    background: rgba(16, 169, 225, 0.1);
    color: var(--primary-light);
}

/* ======================================================
   LOADING STATES
   ====================================================== */

.loading-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 50vh;
    padding: var(--spacing-8);
}

.loading-card {
    background: var(--color-bg-elevated);
    padding: var(--spacing-12);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 400px;
    width: 100%;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-6);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-border);
    border-top: 4px solid var(--primary-light);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.loading-spinner-lg {
    width: 64px;
    height: 64px;
    border-width: 6px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text h3 {
    margin: 0 0 var(--spacing-2) 0;
    color: var(--primary);
    font-size: var(--text-xl);
    font-weight: var(--font-weight-semibold);
}

.loading-text p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

/* ======================================================
   MODERN PAGE HEADERS
   ====================================================== */

.page-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--color-text-inverse);
    padding: var(--spacing-10) var(--spacing-8);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--spacing-8);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 40%;
    height: 100%;
    background: linear-gradient(45deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
    opacity: 0.8;
}

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

.page-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    background: rgba(255, 255, 255, 0.15);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-4);
    backdrop-filter: blur(10px);
}

.page-badge-icon {
    width: 16px;
    height: 16px;
}

.page-title {
    font-size: var(--text-4xl);
    font-weight: var(--font-weight-bold);
    margin: 0 0 var(--spacing-4) 0;
    line-height: var(--leading-tight);
    color: var(--color-text-inverse);
}

.page-meta {
    display: flex;
    gap: var(--spacing-8);
    flex-wrap: wrap;
}

.page-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    opacity: 0.9;
}

.page-meta-icon {
    width: 18px;
    height: 18px;
}

/* ======================================================
   GRID SYSTEMS
   ====================================================== */

.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

@media (min-width: 1024px) {
    .info-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.info-grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.calculations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-4);
    margin: var(--spacing-6) 0;
}

/* ======================================================
   RESPONSIVE UTILITIES
   ====================================================== */

@media (max-width: 768px) {
    .page-header {
        padding: var(--spacing-8) var(--spacing-6);
        border-radius: var(--radius-xl);
        margin-bottom: var(--spacing-6);
    }
    
    .page-title {
        font-size: var(--text-3xl);
    }
    
    .page-meta {
        gap: var(--spacing-4);
    }
    
    .info-grid {
        gap: var(--spacing-4);
    }
    
    .card {
        padding: var(--spacing-4);
    }
    
    .calculations-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-3);
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: var(--spacing-6) var(--spacing-4);
    }
    
    .page-title {
        font-size: var(--text-2xl);
    }
    
    .card {
        padding: var(--spacing-4);
    }
}

/* ======================================================
   LOGIN PAGE SPECIFIC STYLES
   ====================================================== */

/* Background image utilities */
.object-cover {
    object-fit: cover;
}

.object-center {
    object-position: center;
}

/* Backdrop blur effect */
.backdrop-blur-sm {
    backdrop-filter: blur(4px);
}

.backdrop-blur {
    backdrop-filter: blur(8px);
}

/* Background opacity utilities */
.bg-white\/95 {
    background-color: rgba(255, 255, 255, 0.95);
}

.bg-black\/60 {
    background-color: rgba(0, 0, 0, 0.6);
}

.bg-black\/40 {
    background-color: rgba(0, 0, 0, 0.4);
}

/* Border with opacity */
.border-white\/20 {
    border-color: rgba(255, 255, 255, 0.2);
}

/* Gradient backgrounds */
.bg-gradient-to-br {
    background-image: linear-gradient(to bottom right, var(--tw-gradient-stops));
}

.from-black\/60 {
    --tw-gradient-from: rgba(0, 0, 0, 0.6);
    --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(0, 0, 0, 0));
}

.via-black\/40 {
    --tw-gradient-stops: var(--tw-gradient-from), rgba(0, 0, 0, 0.4), var(--tw-gradient-to, rgba(0, 0, 0, 0));
}

.to-black\/60 {
    --tw-gradient-to: rgba(0, 0, 0, 0.6);
}

/* Text color utilities for login page */
.text-gray-200 {
    color: #e5e7eb;
}

.text-gray-300 {
    color: #d1d5db;
}

/* Filter utilities for SVG logo */
.filter {
    filter: var(--tw-filter);
}

.brightness-0 {
    --tw-brightness: brightness(0);
    --tw-filter: var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow);
}

.invert {
    --tw-invert: invert(1);
    --tw-filter: var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow);
}

/* Shadow utilities */
.shadow-2xl {
    box-shadow: var(--shadow-2xl);
}

/* Layout utilities */
.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.inset-0 {
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}

.z-0 {
    z-index: 0;
}

.z-10 {
    z-index: 10;
}

.overflow-hidden {
    overflow: hidden;
}

.w-full {
    width: 100%;
}

.h-full {
    height: 100%;
}

.h-16 {
    height: 4rem;
}

.w-auto {
    width: auto;
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-6 {
    margin-bottom: 1.5rem;
}

.min-h-screen {
    min-height: 100vh;
}

.flex {
    display: flex;
}

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

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

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

.max-w-md {
    max-width: 28rem;
}

.py-12 {
    padding-top: 3rem;
    padding-bottom: 3rem;
}

.px-4 {
    padding-left: 1rem;
    padding-right: 1rem;
}

@media (min-width: 640px) {
    .sm\:px-6 {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
}

@media (min-width: 1024px) {
    .lg\:px-8 {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}