* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #ff4757;
    --youtube: #ff0000;
    --tiktok: #000000;
    --facebook: #1877f2;
    --instagram: #e4405f;
    --whatsapp: #25d366;
    --dark: #2f3542;
    --light: #f1f2f6;
    --success: #2ed573;
    --warning: #ffa502;
    --info: #3742fa;
    --gradient-1: #1e3c72;
    --gradient-2: #2a5298;
    --card-bg: rgba(255, 255, 255, 0.1);
    --card-border: rgba(255, 255, 255, 0.1);
}

body {
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
    color: var(--light);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

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

/* Header Styles */
header {
    text-align: center;
    padding: 40px 0 30px;
}

.logo {
    font-size: 4rem;
    margin-bottom: 20px;
    color: white;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    animation: float 3s ease-in-out infinite;
}

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

h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    background: linear-gradient(45deg, #ff9a9e, #fad0c4, #fad0c4, #a1c4fd);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    background-size: 300% 300%;
    animation: gradient 3s ease infinite;
}

@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.tagline {
    font-size: 1.3rem;
    opacity: 0.9;
    margin-bottom: 25px;
    font-weight: 300;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--light);
    text-decoration: none;
    padding: 12px 25px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    transition: all 0.3s ease;
    margin-top: 20px;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(-8px);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Platform Cards */
.platform-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

.platform-card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border-radius: 25px;
    padding: 35px 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s ease;
    border: 1px solid var(--card-border);
    position: relative;
    overflow: hidden;
}

.platform-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.6s;
}

.platform-card:hover::before {
    left: 100%;
}

.platform-card:hover {
    transform: translateY(-12px) scale(1.02);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.platform-icon {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2.8rem;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

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

.platform-icon.youtube {
    background: linear-gradient(45deg, var(--youtube), #cc0000);
}

.platform-icon.tiktok {
    background: linear-gradient(45deg, var(--tiktok), #333333);
}

.platform-icon.facebook {
    background: linear-gradient(45deg, var(--facebook), #166fe5);
}

.platform-card h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.platform-card p {
    opacity: 0.9;
    margin-bottom: 25px;
    font-size: 1.1rem;
    line-height: 1.5;
}

.features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 30px;
}

.features span {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    padding: 8px 15px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 25px;
    transition: all 0.3s ease;
}

.features span:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(5px);
}

.features i {
    color: var(--success);
}

.platform-btn {
    background: linear-gradient(45deg, var(--primary), #ff3742);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 auto;
    box-shadow: 0 5px 15px rgba(255, 71, 87, 0.3);
}

.platform-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 71, 87, 0.4);
    background: linear-gradient(45deg, #ff3742, var(--primary));
}

/* Card Styles */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border-radius: 25px;
    padding: 40px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    margin-bottom: 40px;
    border: 1px solid var(--card-border);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.input-group {
    display: flex;
    margin-bottom: 25px;
    position: relative;
}

input {
    flex: 1;
    padding: 18px 25px;
    border: none;
    border-radius: 50px 0 0 50px;
    background: rgba(255, 255, 255, 0.12);
    color: white;
    font-size: 1.1rem;
    outline: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

input:focus {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.3);
}

input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

button {
    background: linear-gradient(45deg, var(--primary), #ff3742);
    color: white;
    border: none;
    padding: 0 35px;
    border-radius: 0 50px 50px 0;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 5px 15px rgba(255, 71, 87, 0.3);
}

button:hover {
    background: linear-gradient(45deg, #ff3742, var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 71, 87, 0.4);
}

/* Quality Section */
.quality-section {
    margin: 30px 0;
    padding: 25px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 20px;
}

.quality-section h3 {
    margin-bottom: 20px;
    font-size: 1.4rem;
    text-align: center;
    color: var(--light);
}

.quality-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.quality-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 12px 25px;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 500;
    min-width: 80px;
    text-align: center;
}

.quality-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.quality-btn.active {
    background: var(--success);
    border-color: var(--success);
    box-shadow: 0 5px 15px rgba(46, 213, 115, 0.3);
    transform: translateY(-2px);
}

/* Video Info */
.video-info {
    display: none;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 2px solid rgba(255, 255, 255, 0.1);
    animation: fadeIn 0.5s ease;
}

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

.thumbnail {
    width: 100%;
    max-width: 500px;
    border-radius: 20px;
    margin: 0 auto 25px;
    display: block;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease;
}

.thumbnail:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
}

.video-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    line-height: 1.4;
    text-align: center;
    font-weight: 600;
}

.video-meta {
    display: flex;
    justify-content: space-around;
    margin-bottom: 30px;
    font-size: 1rem;
    opacity: 0.9;
    flex-wrap: wrap;
    gap: 20px;
    text-align: center;
}

.video-meta span {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 25px;
    transition: all 0.3s ease;
}

.video-meta span:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

/* Download Options */
.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.download-section {
    margin-top: 25px;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px 25px;
    color: white;
    text-align: center;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: none;
    cursor: pointer;
    gap: 10px;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    text-decoration: none;
    color: white;
}

.download-btn.video-download {
    background: linear-gradient(45deg, var(--success), #26c965);
}

.download-btn.audio-download {
    background: linear-gradient(45deg, var(--warning), #ffb142);
}

.download-btn.hd-download {
    background: linear-gradient(45deg, var(--facebook), #166fe5);
}

.download-btn.sd-download {
    background: linear-gradient(45deg, var(--success), #26c965);
}

.download-btn i {
    font-size: 1.2rem;
}

/* Loading & Error */
.loading {
    display: none;
    text-align: center;
    padding: 40px;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.loading p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.error {
    display: none;
    background: rgba(255, 71, 87, 0.15);
    border-left: 5px solid var(--primary);
    padding: 20px;
    border-radius: 15px;
    margin-top: 25px;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.error p {
    margin: 0;
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
}

/* Instructions */
.instructions {
    text-align: center;
    margin: 60px 0;
    padding: 40px;
    background: var(--card-bg);
    border-radius: 25px;
    backdrop-filter: blur(15px);
    border: 1px solid var(--card-border);
}

.instructions h2 {
    font-size: 2.2rem;
    margin-bottom: 40px;
    background: linear-gradient(45deg, #ff9a9e, #fad0c4);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.step {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(45deg, var(--primary), var(--success));
}

.step:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.step-number {
    width: 70px;
    height: 70px;
    background: linear-gradient(45deg, var(--primary), var(--success));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: bold;
    margin: 0 auto 20px;
    box-shadow: 0 8px 20px rgba(255, 71, 87, 0.3);
}

.step p {
    font-size: 1.2rem;
    opacity: 0.9;
    line-height: 1.5;
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px;
    margin-top: 60px;
    font-size: 1rem;
    opacity: 0.8;
    border-top: 2px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .logo {
        font-size: 3rem;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    .platform-cards {
        grid-template-columns: 1fr;
        gap: 25px;
        margin: 30px 0;
    }
    
    .platform-card {
        padding: 25px 20px;
    }
    
    .platform-icon {
        width: 80px;
        height: 80px;
        font-size: 2.2rem;
    }
    
    .card {
        padding: 25px 20px;
        margin-bottom: 30px;
    }
    
    .input-group {
        flex-direction: column;
    }

    input {
        border-radius: 50px;
        margin-bottom: 15px;
        padding: 16px 20px;
    }

    button {
        border-radius: 50px;
        padding: 16px 20px;
        justify-content: center;
    }
    
    .video-meta {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .download-options {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .quality-selector {
        gap: 8px;
    }
    
    .quality-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
        min-width: 70px;
    }
    
    .steps {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .instructions {
        padding: 30px 20px;
        margin: 40px 0;
    }
    
    .instructions h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .logo {
        font-size: 2.5rem;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .tagline {
        font-size: 1.1rem;
    }
    
    .platform-cards {
        grid-template-columns: 1fr;
    }
    
    .platform-card {
        padding: 20px 15px;
    }
    
    .card {
        padding: 20px 15px;
    }
    
    .download-btn {
        padding: 15px 20px;
        font-size: 1rem;
    }
    
    .step-number {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, var(--primary), var(--success));
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, var(--success), var(--primary));
}

/* Selection Color */
::selection {
    background: rgba(255, 71, 87, 0.3);
    color: white;
}

/* Focus Outline */
button:focus, 
input:focus, 
.download-btn:focus {
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .platform-btn,
    .back-btn,
    button {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .card {
        background: white !important;
        border: 1px solid #ccc !important;
    }
}