/* ===================================
   BUTTONS
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
    color: white;
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

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

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ===================================
   CARDS
   =================================== */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.card-header {
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.card-body {
    margin-bottom: var(--spacing-lg);
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border-light);
}

/* ===================================
   UNIT CARDS
   =================================== */
.units-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.unit-card {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-decoration: none;
    color: var(--color-text);
    overflow: hidden;
    transition: all var(--transition-base);
}

.unit-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.unit-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.unit-card:hover::before {
    opacity: 0.05;
}

.unit-icon {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-lg);
    color: white;
    position: relative;
    z-index: 1;
}

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

.unit-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xs);
}

.unit-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.unit-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.unit-arrow {
    flex-shrink: 0;
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    transition: transform var(--transition-base);
    position: relative;
    z-index: 1;
}

.unit-card:hover .unit-arrow {
    transform: translateX(5px);
}

/* ===================================
   CONTACT CARDS
   =================================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-card {
    text-align: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    transition: all var(--transition-base);
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.contact-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-xl);
    color: white;
}

.contact-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.contact-link {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
}

.contact-link:hover {
    text-decoration: underline;
}

/* ===================================
   FORMS
   =================================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(106, 90, 255, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-error {
    font-size: var(--font-size-sm);
    color: var(--color-error);
    margin-top: var(--spacing-xs);
}

.form-helper {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--spacing-xs);
}

/* ===================================
   PROGRESS BARS
   =================================== */
.progress {
    height: 8px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-label {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
}

/* ===================================
   BADGES
   =================================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background: var(--color-primary);
    color: white;
}

.badge-success {
    background: var(--color-success);
    color: white;
}

.badge-warning {
    background: var(--color-warning);
    color: white;
}

.badge-error {
    background: var(--color-error);
    color: white;
}

.badge-info {
    background: var(--color-info);
    color: white;
}

.badge-outline {
    background: transparent;
    border: 2px solid currentColor;
}

/* ===================================
   BREADCRUMBS
   =================================== */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) 0;
    font-size: var(--font-size-sm);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.breadcrumb-item a {
    color: var(--color-text-secondary);
}

.breadcrumb-item a:hover {
    color: var(--color-primary);
}

.breadcrumb-item::after {
    content: '/';
    color: var(--color-text-tertiary);
}

.breadcrumb-item:last-child::after {
    display: none;
}

.breadcrumb-item:last-child {
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
}

/* ===================================
   MODALS
   =================================== */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-backdrop.active {
    display: flex;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--font-size-2xl);
    margin: 0;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* ===================================
   FILE UPLOAD
   =================================== */
.file-upload {
    position: relative;
}

.file-upload-area {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
}

.file-upload-area:hover,
.file-upload-area.dragover {
    border-color: var(--color-primary);
    background: var(--color-bg-tertiary);
}

.file-upload-input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.file-upload-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-primary);
}

.file-upload-text {
    font-size: var(--font-size-base);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.file-upload-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.file-list {
    margin-top: var(--spacing-md);
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.file-item-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.file-item-info {
    flex: 1;
}

.file-item-name {
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-xs);
}

.file-item-size {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.file-item-remove {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--color-error);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.file-item-remove:hover {
    background: var(--color-error);
    color: white;
}

/* ===================================
   ALERTS
   =================================== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid;
    margin-bottom: var(--spacing-md);
}

.alert-success {
    background: rgba(74, 222, 128, 0.1);
    border-color: var(--color-success);
    color: var(--color-success);
}

.alert-warning {
    background: rgba(251, 191, 36, 0.1);
    border-color: var(--color-warning);
    color: var(--color-warning);
}

.alert-error {
    background: rgba(248, 113, 113, 0.1);
    border-color: var(--color-error);
    color: var(--color-error);
}

.alert-info {
    background: rgba(96, 165, 250, 0.1);
    border-color: var(--color-info);
    color: var(--color-info);
}

/* ===================================
   LOADING SPINNER
   =================================== */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

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

.spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 6px;
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 768px) {
    .units-grid {
        grid-template-columns: 1fr;
    }

    .unit-card {
        flex-direction: column;
        text-align: center;
    }

    .unit-arrow {
        transform: rotate(90deg);
    }

    .unit-card:hover .unit-arrow {
        transform: rotate(90deg) translateX(5px);
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }
}