* {
    font-family: 'Inter', sans-serif;
}

:root {
    --primary-blue: #3b82f6;
    --primary-blue-dark: #1d4ed8;
    --success-green: #10b981;
    --error-red: #ef4444;
    --bg-light: #ffffff;
    --bg-dark: #0f172a;
    --text-light: #1f2937;
    --text-dark: #f8fafc;
}

.dark {
    --bg: var(--bg-dark);
    --text: var(--text-dark);
}

.light {
    --bg: var(--bg-light);
    --text: var(--text-light);
}

.dni-nie-calculator-container {
    min-height: auto;
    padding: 0.5rem;
    background: linear-gradient(135deg, #dbeafe 0%, #f5f5f5 50%, #ffffff 100%);
    transition: all 0.5s ease;
    border-radius: 1rem;
}

.dark .dni-nie-calculator-container {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
}

.gradient-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.glassmorphism {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.input-focus {
    transition: all 0.3s ease;
}

.input-focus:focus {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.bounce-in {
    animation: bounceIn 0.6s ease-out;
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.pulse-ring {
    animation: pulseRing 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

@keyframes pulseRing {
    0% {
        transform: scale(0.8);
    }
    40% {
        transform: scale(1);
    }
    83% {
        transform: scale(0.87);
    }
    100% {
        transform: scale(0.8);
    }
}

.success-animation {
    animation: successPulse 0.6s ease-out;
}

@keyframes successPulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
        background-color: #10b981;
    }
    100% {
        transform: scale(1);
    }
}

.tooltip {
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    transform: translateY(5px);
}

.tooltip.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.error-shake {
    animation: errorShake 0.5s ease-out;
}

@keyframes errorShake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-3px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(3px);
    }
}

.tab-active {
    background: linear-gradient(45deg, var(--primary-blue), var(--primary-blue-dark));
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
}

.history-item {
    transition: all 0.3s ease;
}

.history-item:hover {
    transform: translateX(4px);
    background-color: rgba(59, 130, 246, 0.1);
}

.floating-label {
    transform: translateY(-50%) scale(0.8);
    color: var(--primary-blue);
}

.loading-dots {
    display: inline-block;
}

.loading-dots:after {
    content: '';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% {
        content: '';
    }
    40% {
        content: '.';
    }
    60% {
        content: '..';
    }
    80%, 100% {
        content: '...';
    }
}

.doc-type-btn {
    background: white;
    border: 2px solid #e5e7eb;
    color: #374151;
    transition: all 0.3s ease;
}

.dark .doc-type-btn {
    background: #374151;
    border-color: #4b5563;
    color: #d1d5db;
}

.doc-type-active {
    background: linear-gradient(45deg, var(--primary-blue), var(--primary-blue-dark));
    border-color: var(--primary-blue);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
}

/* Reduced margins and spacing for tighter layout */
.space-y-6 > :not([hidden]) ~ :not([hidden]) {
    margin-top: 0.5rem;
}

.space-y-4 > :not([hidden]) ~ :not([hidden]) {
    margin-top: 0.375rem;
}

.space-y-3 > :not([hidden]) ~ :not([hidden]) {
    margin-top: 0.25rem;
}

.space-y-2 > :not([hidden]) ~ :not([hidden]) {
    margin-top: 0.125rem;
}

.mb-6 {
    margin-bottom: 0.5rem;
}

.mb-4 {
    margin-bottom: 0.375rem;
}

.mb-3 {
    margin-bottom: 0.25rem;
}

.mb-2 {
    margin-bottom: 0.125rem;
}

.py-4 {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.py-3 {
    padding-top: 0.375rem;
    padding-bottom: 0.375rem;
}

.py-2 {
    padding-top: 0.25rem;
    padding-bottom: 0.25rem;
}

.p-6 {
    padding: 0.75rem;
}

.p-4 {
    padding: 0.5rem;
}

.p-3 {
    padding: 0.375rem;
}

.gap-4 {
    gap: 0.5rem;
}

.gap-3 {
    gap: 0.375rem;
}

.gap-2 {
    gap: 0.25rem;
}