/* ===================================
   PDF4Locker - Main Stylesheet
   Primary Color: #c2f711
   Secondary Color: #5e5e5e
   =================================== */

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #c2f711;
    --primary-dark: #a8d40f;
    --secondary-color: #5e5e5e;
    --dark-bg: #1a1a1a;
    --light-bg: #f8f9fa;
    --text-dark: #2c3e50;
    --text-light: #6c757d;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    text-decoration: none;
    transition: transform 0.3s ease;
}

.logo i {
    color: var(--primary-color);
    font-size: 1.8rem;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:not(.btn-primary-small):hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a:not(.btn-primary-small)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-menu a:not(.btn-primary-small):hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.btn-primary-small {
    background: var(--primary-color);
    color: var(--text-dark);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary-small:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(194, 247, 17, 0.3);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: all 0.3s ease;
    border-radius: 3px;
}

/* Hero Section */
.hero {
    position: relative;
    background: linear-gradient(135deg, #1a1a1a 0%, #2c2c2c 100%);
    color: var(--white);
    padding: 120px 0 80px;
    overflow: hidden;
}

.particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.particle {
    position: absolute;
    color: var(--primary-color);
    opacity: 0.3;
    animation: float 20s infinite ease-in-out;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(20px, -20px) rotate(90deg);
    }
    50% {
        transform: translate(-20px, 20px) rotate(180deg);
    }
    75% {
        transform: translate(20px, 20px) rotate(270deg);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    animation: fadeInUp 1s ease;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    background: var(--primary-color);
    color: var(--text-dark);
    padding: 1.2rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(194, 247, 17, 0.3);
    animation: fadeInUp 1.2s ease;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(194, 247, 17, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    background: transparent;
    color: var(--text-dark);
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid var(--secondary-color);
    cursor: pointer;
}

.btn-secondary:hover {
    background: var(--secondary-color);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

.hero-features {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.feature-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: rgba(194, 247, 17, 0.1);
    border: 1px solid rgba(194, 247, 17, 0.3);
    border-radius: 50px;
    animation: fadeInUp 1.4s ease;
}

.feature-badge i {
    color: var(--primary-color);
}

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

/* Section Styles */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* Introduction Section */
.intro-section {
    background: var(--light-bg);
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.intro-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
}

.intro-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.intro-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.intro-icon i {
    font-size: 2rem;
    color: var(--text-dark);
}

.intro-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.intro-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Tool Section */
.tool-section {
    background: var(--white);
}

.tool-header {
    text-align: center;
    margin-bottom: 3rem;
}

.tool-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.tool-header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

.tool-container {
    max-width: 700px;
    margin: 0 auto;
    background: var(--light-bg);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.upload-area {
    border: 3px dashed var(--secondary-color);
    border-radius: 15px;
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--white);
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--primary-color);
    background: rgba(194, 247, 17, 0.05);
}

.upload-content i {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.upload-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-content p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.file-info {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.file-details {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-details i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.file-text {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.file-name {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.3rem;
}

.file-size {
    font-size: 0.9rem;
    color: var(--text-light);
}

.btn-remove {
    background: #dc3545;
    color: var(--white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-remove:hover {
    background: #c82333;
    transform: scale(1.1);
}

.password-section {
    margin-top: 2rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.password-input {
    position: relative;
}

.password-input input {
    width: 100%;
    padding: 1rem 3rem 1rem 1rem;
    border: 2px solid var(--secondary-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.password-input input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(194, 247, 17, 0.1);
}

.toggle-password {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    transition: color 0.3s ease;
}

.toggle-password:hover {
    color: var(--primary-color);
}

.password-strength {
    margin-top: 0.5rem;
    height: 4px;
    background: #e0e0e0;
    border-radius: 2px;
    overflow: hidden;
}

.password-strength::after {
    content: '';
    display: block;
    height: 100%;
    width: 0;
    transition: all 0.3s ease;
}

.password-strength.weak::after {
    width: 33%;
    background: #dc3545;
}

.password-strength.medium::after {
    width: 66%;
    background: #ffc107;
}

.password-strength.strong::after {
    width: 100%;
    background: #28a745;
}

.progress-section {
    text-align: center;
    padding: 3rem 0;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: #e0e0e0;
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    width: 0;
    transition: width 0.3s ease;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.progress-text {
    color: var(--text-light);
    font-weight: 600;
}

.success-section {
    text-align: center;
    padding: 2rem 0;
}

.success-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #28a745, #20c997);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: scaleIn 0.5s ease;
}

.success-icon i {
    font-size: 3rem;
    color: var(--white);
}

@keyframes scaleIn {
    from {
        transform: scale(0);
    }
    to {
        transform: scale(1);
    }
}

.success-section h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.success-section p {
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.success-section button {
    margin: 0.5rem;
}

/* How It Works */
.how-it-works {
    background: var(--light-bg);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
}

.step-card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    position: relative;
}

.step-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--text-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: 1.5rem auto 1.5rem;
    background: rgba(194, 247, 17, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.step-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.step-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Benefits Section */
.benefits-section {
    background: var(--white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.benefit-card {
    padding: 2.5rem;
    border-radius: 15px;
    background: var(--light-bg);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.benefit-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.benefit-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.benefit-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.benefit-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Use Cases */
.use-cases {
    background: var(--light-bg);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.use-case-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.use-case-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.use-case-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.use-case-icon i {
    font-size: 2rem;
    color: var(--text-dark);
}

.use-case-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.use-case-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Footer */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-logo i {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(194, 247, 17, 0.1);
    border: 1px solid rgba(194, 247, 17, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--primary-color);
    color: var(--text-dark);
    transform: translateY(-3px);
}

.footer-column h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.8rem;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-column ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .tool-container {
        padding: 2rem 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .hero-features {
        gap: 1rem;
    }

    .feature-badge {
        font-size: 0.9rem;
        padding: 0.6rem 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn-primary,
    .btn-large {
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }

    .intro-card,
    .benefit-card,
    .use-case-card {
        padding: 2rem 1.5rem;
    }
}