/**
 * Button Component Styles
 *
 * Modern button styles for FDM Web
 */

/* ============================================
   BASE BUTTON STYLES
   ============================================ */

.btn-primary,
.btn-secondary,
.btn-danger,
.btn-success,
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    font-family: inherit;
    cursor: pointer;
    transition: all var(--duration-base) var(--ease-out);
    border: none;
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-primary:disabled,
.btn-secondary:disabled,
.btn-danger:disabled,
.btn-success:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    filter: grayscale(50%);
}

/* ============================================
   PRIMARY BUTTON
   ============================================ */

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 107, 53, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(255, 107, 53, 0.3);
}

/* ============================================
   SECONDARY BUTTON
   ============================================ */

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

.btn-secondary:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

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

/* ============================================
   DANGER BUTTON
   ============================================ */

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.4);
}

.btn-danger:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

/* ============================================
   SUCCESS BUTTON
   ============================================ */

.btn-success {
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(34, 197, 94, 0.4);
}

.btn-success:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(34, 197, 94, 0.3);
}

/* ============================================
   OUTLINE BUTTON
   ============================================ */

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

.btn-outline:hover {
    background: var(--color-primary-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.2);
}

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

/* ============================================
   BUTTON SIZES
   ============================================ */

.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);
}

/* ============================================
   BUTTON ICON STYLES
   ============================================ */

.btn-primary i,
.btn-secondary i,
.btn-danger i,
.btn-success i,
.btn-outline i {
    font-size: 1em;
}

/* ============================================
   LOADING STATE
   ============================================ */

.btn-loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn-loading i.fa-spinner {
    animation: spin 0.8s linear infinite;
}

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

/* ============================================
   ALERT STYLES
   ============================================ */

.alert {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.alert i {
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error-dark);
    border: 1px solid var(--color-error-border);
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success-dark);
    border: 1px solid var(--color-success-border);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background: var(--color-info-bg);
    color: var(--color-info-dark);
    border: 1px solid var(--color-info-border);
}

/* ============================================
   FORM FIELD STYLES
   ============================================ */

.form-field {
    margin-bottom: var(--spacing-lg);
}

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

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border-medium);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: var(--transition-base);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

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