/* ===== MODERN COMPONENT STYLES ===== */
/* Following Material Design 3.0 and European design standards */

/* ===== BUTTON COMPONENTS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    min-height: 48px;
    position: relative;
    white-space: nowrap;
}

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

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

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow:
        0 4px 15px rgba(102, 126, 234, 0.4),
        0 2px 4px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

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

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

.btn-primary:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    transform: translateY(-2px);
    box-shadow:
        0 8px 25px rgba(102, 126, 234, 0.5),
        0 4px 8px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow:
        0 4px 15px rgba(102, 126, 234, 0.4),
        0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-ghost {
    background: transparent;
    color: var(--color-gray-700);
    border: 1px solid var(--color-gray-300);
}

.btn-ghost:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-400);
}

/* ===== CARD COMPONENTS ===== */
.card {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-100);
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-gray-200);
}

.card-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-gray-100);
}

.card-body {
    padding: var(--space-6);
}

.card-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--color-gray-100);
    background: var(--color-gray-50);
}

/* ===== BADGE COMPONENTS ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.badge-success {
    background: #dcfce7;
    color: var(--color-success);
}

.badge-warning {
    background: #fef3c7;
    color: var(--color-warning);
}

.badge-error {
    background: #fee2e2;
    color: var(--color-error);
}

/* ===== ALERT COMPONENTS ===== */
.alert {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    margin-bottom: var(--space-4);
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.alert-info {
    background: #eff6ff;
    border-color: var(--color-info);
    color: #1e40af;
}

.alert-success {
    background: #f0fdf4;
    border-color: var(--color-success);
    color: #166534;
}

.alert-warning {
    background: #fffbeb;
    border-color: var(--color-warning);
    color: #92400e;
}

.alert-error {
    background: #fef2f2;
    border-color: var(--color-error);
    color: #991b1b;
}

/* ===== LOADING COMPONENTS ===== */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-gray-200);
    border-top: 2px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-dots {
    display: inline-flex;
    gap: var(--space-1);
}

.loading-dots span {
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out infinite both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* ===== TOOLTIP COMPONENTS ===== */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip-content {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-gray-800);
    color: white;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    white-space: nowrap;
    z-index: 1000;
    transition: var(--transition-normal);
}

.tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--color-gray-800);
}

.tooltip:hover .tooltip-content {
    visibility: visible;
    opacity: 1;
}

/* ===== PROGRESS COMPONENTS ===== */
.progress {
    width: 100%;
    height: 8px;
    background: var(--color-gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

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

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===== MODAL COMPONENTS ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}

.modal {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ===== EUROPEAN DESIGN PATTERNS ===== */
/* Clean, minimal design following European web standards */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-gray-300), transparent);
    margin: var(--space-16) 0;
}

.content-max-width {
    max-width: 65ch; /* Optimal reading width */
    margin: 0 auto;
}

/* ===== MICROINTERACTIONS ===== */
.hover-lift {
    transition: var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-2px);
}

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

.hover-scale:hover {
    transform: scale(1.02);
}

.focus-ring {
    transition: var(--transition-fast);
}

.focus-ring:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}