/**
 * nivro.cc - Professional URL Shortener
 * Modern, Luxurious, Secure Design
 */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-blue: #0066FF;
    --primary-blue-dark: #0052CC;
    --primary-blue-light: #3385FF;
    --white: #FFFFFF;
    --gray-light: #F5F7FA;
    --gray-medium: #E8ECF0;
    --gray-dark: #6B7280;
    --text-dark: #1F2937;
    --text-light: #9CA3AF;
    --success: #10B981;
    --error: #EF4444;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 102, 255, 0.15);
    --shadow-xl: 0 20px 60px rgba(0, 102, 255, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    padding: 20px 0;
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    padding: 15px 0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 700;
    font-size: 24px;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo:hover .logo-icon {
    animation: logoBounce 0.6s ease;
}

@keyframes logoBounce {
    0%, 100% {
        transform: scale(1) rotate(0deg);
    }
    25% {
        transform: scale(1.1) rotate(-10deg);
    }
    75% {
        transform: scale(1.1) rotate(10deg);
    }
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    animation: logoPulse 2s ease-in-out infinite;
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transform: rotate(45deg);
    animation: logoShine 3s infinite;
}

.logo-icon i {
    position: relative;
    z-index: 1;
    animation: logoRotate 3s ease-in-out infinite;
}

@keyframes logoPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: var(--shadow-md);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
    }
}

@keyframes logoShine {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

@keyframes logoRotate {
    0%, 100% {
        transform: rotate(0deg);
    }
    25% {
        transform: rotate(-5deg);
    }
    75% {
        transform: rotate(5deg);
    }
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-tagline {
    color: var(--gray-dark);
    font-size: 14px;
    font-weight: 400;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 30px 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(0, 102, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    max-width: 800px;
    width: 100%;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 800;
    color: var(--white);
    margin-bottom: 20px;
    line-height: 1.2;
    animation: fadeInUp 0.8s ease;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 50px;
    font-weight: 400;
    animation: fadeInUp 0.8s ease 0.2s both;
}

/* URL Shortener Box */
.url-box {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 35px 40px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.8s ease 0.4s both;
    margin-bottom: 40px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    max-width: 100%;
    position: relative;
    overflow: visible;
}

.url-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-blue-light), var(--primary-blue));
    opacity: 0.8;
}

.url-form {
    position: relative;
}

.url-form .input-group {
    margin-bottom: 0;
}

.url-input {
    flex: 1;
    padding: 18px 24px;
    border: 2px solid var(--gray-medium);
    border-radius: 12px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--white);
}

.url-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
}

.url-input.error {
    border-color: var(--error);
}

.btn-shorten {
    padding: 18px 40px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    font-family: inherit;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-shorten i {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.btn-shorten:hover i {
    transform: rotate(45deg);
}

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

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

.btn-shorten:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.error-message {
    color: var(--error);
    font-size: 14px;
    margin-top: 15px;
    padding: 14px 18px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 10px;
    border-left: 4px solid var(--error);
    display: none;
    animation: shake 0.5s ease;
}

.error-message.show {
    display: block;
}

.success-message {
    color: var(--success);
    font-size: 14px;
    margin-top: 15px;
    padding: 14px 18px;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 10px;
    border-left: 4px solid var(--success);
    display: none;
}

.success-message.show {
    display: block;
}

.result-box {
    margin-top: 20px;
    padding: 20px;
    background: var(--gray-light);
    border-radius: 12px;
    display: none;
}

.result-box.show {
    display: block;
    animation: fadeIn 0.5s ease;
}

.result-label {
    font-size: 12px;
    color: var(--gray-dark);
    margin-bottom: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-url {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.result-url input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--gray-medium);
    border-radius: 8px;
    font-size: 14px;
    font-family: 'Courier New', monospace;
    background: var(--white);
}

.btn-copy {
    padding: 12px 20px;
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-copy:hover {
    background: var(--primary-blue-dark);
}

.btn-copy.copied {
    background: var(--success);
}

/* Features Section */
.features {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    padding: 100px 30px;
    position: relative;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--gray-dark);
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background: var(--white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-medium);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-md);
    color: white;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.feature-card:hover .feature-icon::before {
    width: 200px;
    height: 200px;
}

.feature-card:hover .feature-icon {
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-lg);
}

.feature-icon i {
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon i {
    transform: scale(1.1) rotate(5deg);
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.feature-description {
    font-size: 15px;
    color: var(--gray-dark);
    line-height: 1.7;
}

/* Security Section */
.security {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    padding: 100px 30px;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.security::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.security-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.security-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    margin-bottom: 20px;
}

.security-subtitle {
    font-size: 20px;
    opacity: 0.95;
    margin-bottom: 50px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.security-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 50px;
}

.security-badge {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 30px 40px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.security-badge:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px);
}

.badge-icon {
    font-size: 48px;
    margin-bottom: 15px;
    color: white;
    animation: badgeFloat 3s ease-in-out infinite;
}

.badge-icon i {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    transition: transform 0.3s ease;
}

.security-badge:hover .badge-icon i {
    transform: scale(1.15) rotate(5deg);
}

@keyframes badgeFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.badge-text {
    font-size: 16px;
    font-weight: 600;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 50px 30px 30px;
    text-align: center;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--white);
}

.footer-text {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin-top: 20px;
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spin 0.8s linear infinite;
    margin-right: 10px;
}

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

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        padding: 0 20px;
    }
    
    .header-tagline {
        display: none;
    }
    
    .url-form {
        flex-direction: column;
    }
    
    .btn-shorten {
        width: 100%;
    }
    
    .url-box {
        padding: 25px 20px;
    }
    
    .results-container {
        max-height: 400px;
    }
    
    .result-item {
        padding: 18px;
    }
    
    .result-item-url {
        flex-direction: column;
    }
    
    .btn-copy-item {
        width: 100%;
        margin-top: 8px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .security-badges {
        flex-direction: column;
        align-items: center;
    }
}

/* Smooth Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-blue);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-blue-dark);
}

/* New Features Styles */
.input-group {
    display: flex;
    gap: 15px;
    margin-bottom: 0;
}

.link-count-option {
    margin-top: 18px;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.link-count-option:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: rgba(255, 255, 255, 0.6);
}

.count-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    color: var(--white);
    font-weight: 500;
}

.count-select {
    padding: 8px 12px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s;
    margin-left: 10px;
}

.count-select:focus {
    outline: none;
    border-color: var(--white);
    background: var(--white);
}

.results-container {
    margin-top: 25px;
    max-height: 550px;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 8px;
    padding-top: 5px;
}

.results-container:empty {
    display: none;
}

.results-container.has-results {
    padding: 20px;
    background: rgba(245, 247, 250, 0.6);
    border-radius: 16px;
    border: 1px solid rgba(0, 102, 255, 0.15);
    margin-top: 20px;
    backdrop-filter: blur(10px);
}

.results-container.has-results::before {
    content: '✓ Link Generati con Successo';
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary-blue);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(0, 102, 255, 0.15);
}

.results-container::-webkit-scrollbar {
    width: 6px;
}

.results-container::-webkit-scrollbar-track {
    background: transparent;
}

.results-container::-webkit-scrollbar-thumb {
    background: var(--primary-blue);
    border-radius: 3px;
}

.results-container::-webkit-scrollbar-thumb:hover {
    background: var(--primary-blue-dark);
}

.result-item {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    padding: 22px;
    border-radius: 16px;
    margin-bottom: 14px;
    animation: fadeInUp 0.4s ease;
    border: 1px solid rgba(0, 102, 255, 0.12);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.result-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-blue), var(--primary-blue-light));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.result-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 102, 255, 0.15);
    border-color: rgba(0, 102, 255, 0.3);
}

.result-item:hover::before {
    opacity: 1;
}

.result-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(0, 102, 255, 0.1);
}

.result-item-label {
    font-size: 13px;
    color: var(--primary-blue);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.result-item-label i {
    font-size: 14px;
    opacity: 0.8;
}

.result-item-url {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.result-item-url input {
    flex: 1;
    padding: 14px 18px;
    border: 2px solid var(--gray-medium);
    border-radius: 10px;
    font-size: 14px;
    font-family: 'Courier New', monospace;
    background: var(--white);
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.result-item-url input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
    transform: translateY(-1px);
}

.btn-copy-item {
    padding: 14px 24px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 2px 8px rgba(0, 102, 255, 0.3);
    min-width: 120px;
    justify-content: center;
}

.btn-copy-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.4);
}

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

.btn-copy-item i {
    font-size: 14px;
    transition: transform 0.3s ease;
}

.btn-copy-item:hover i {
    transform: scale(1.2) rotate(5deg);
}

.btn-copy-item.copied {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.btn-copy-item:hover {
    background: var(--primary-blue-dark);
    transform: translateY(-1px);
}

.btn-copy-item.copied {
    background: var(--success);
}

.btn-copy-item.copied::after {
    content: ' ✓';
}

.result-item-original {
    font-size: 12px;
    color: var(--gray-dark);
    margin-top: 12px;
    word-break: break-all;
    padding: 10px 14px;
    background: rgba(0, 102, 255, 0.03);
    border-radius: 8px;
    border-left: 3px solid var(--primary-blue);
    display: flex;
    align-items: center;
    gap: 8px;
}

.result-item-original i {
    color: var(--primary-blue);
    opacity: 0.7;
    font-size: 13px;
}

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

@media (max-width: 768px) {
    .input-group {
        flex-direction: column;
    }
    
    .count-label {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .count-select {
        width: 100%;
        margin-left: 0;
    }
    
    .result-item-url {
        flex-direction: column;
    }
    
    .btn-copy-item {
        width: 100%;
    }
}