* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

:root {
    --primary-navy: #1E3A8A;
    --secondary-navy: #0F172A;
    --accent-blue: #3B82F6;
    --dark-bg: #0A0A0F;
    --card-bg: #12121A;
    --card-border: #252535;
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --success: #10B981;
    --error: #EF4444;
    --warning: #F59E0B;
}

body {
    background: var(--dark-bg);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.particles::before,
.particles::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(30, 58, 138, 0.18) 0%, transparent 70%);
    animation: float 20s infinite ease-in-out;
}

.particles::before {
    top: -100px;
    right: -100px;
}

.particles::after {
    bottom: -100px;
    left: -100px;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(50px, -50px) scale(1.1);
    }
}

/* Auth Modal */
.auth-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.5s ease-out;
}

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

.auth-box {
    background: linear-gradient(145deg, var(--card-bg) 0%, #151520 100%);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 50px 40px;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 25px 80px rgba(0,0,0,0.6);
    transform-style: preserve-3d;
    animation: slideUp 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.auth-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transform: rotate(45deg);
    animation: shimmer 4s infinite linear;
}

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

@keyframes slideUp {
    from {
        transform: translateY(100px) scale(0.9);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.logo-big {
    text-align: center;
    margin-bottom: 35px;
    animation: scaleIn 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) 0.2s backwards;
}

@keyframes scaleIn {
    from {
        transform: scale(0.5);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.logo-icon-big {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--accent-blue) 100%);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
    }
    50% {
        box-shadow: 0 10px 50px rgba(59, 130, 246, 0.5);
    }
}

.app-name {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, #3B82F6 0%, #60A5FA 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.app-tagline {
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 35px;
    background: var(--dark-bg);
    padding: 6px;
    border-radius: 12px;
    position: relative;
    z-index: 1;
}

.auth-tab {
    flex: 1;
    padding: 14px 20px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.auth-tab:hover {
    color: var(--text-primary);
}

.auth-tab.active {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--accent-blue) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
    animation: tabActive 0.4s ease-out;
}

@keyframes tabActive {
    from {
        transform: scale(0.95);
    }
    to {
        transform: scale(1);
    }
}

.auth-form {
    display: none;
    position: relative;
    z-index: 1;
}

.auth-form.active {
    display: block;
    animation: formSlide 0.5s ease-out;
}

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

.auth-form .form-group {
    margin-bottom: 25px;
}

.auth-form .form-group input {
    width: 100%;
    padding: 18px 20px;
    background: var(--dark-bg);
    border: 2px solid var(--card-border);
    border-radius: 12px;
    font-size: 15px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.auth-form .form-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.auth-form .form-group input::placeholder {
    color: var(--text-muted);
}

.auth-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--accent-blue) 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
    margin-top: 10px;
}

.auth-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: left 0.5s ease;
}

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

.auth-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(59, 130, 246, 0.5);
}

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

.btn-spinner {
    width: 20px;
    height: 20px;
    border: 3px solid transparent;
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: none;
}

.auth-btn:disabled .btn-spinner {
    display: block;
}

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

/* Main Container */
.container {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
    animation: containerIn 0.5s ease-out;
}

@keyframes containerIn {
    from {
        opacity: 0;
        transform: scale(0.98);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.sidebar {
    width: 280px;
    background: linear-gradient(180deg, var(--card-bg) 0%, var(--dark-bg) 100%);
    padding: 40px 30px;
    border-right: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.sidebar-header {
    margin-bottom: 35px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(30, 58, 138, 0.35);
    transform-style: preserve-3d;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.logo-icon:hover {
    transform: rotateY(15deg) rotateX(10deg) scale(1.05);
}

.logo-text h1 {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #3B82F6 0%, #60A5FA 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text p {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--dark-bg);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 16px;
    margin-bottom: 25px;
    animation: slideInLeft 0.5s ease-out 0.2s backwards;
}

@keyframes slideInLeft {
    from {
        transform: translateX(-30px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--accent-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 18px;
}

.user-details {
    flex: 1;
}

.user-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.user-email {
    font-size: 12px;
    color: var(--text-muted);
}

.active-users {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: auto;
    animation: slideInLeft 0.5s ease-out 0.3s backwards;
}

.users-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.2) 0%, rgba(30, 58, 138, 0.05) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.users-info {
    display: flex;
    flex-direction: column;
}

.users-info span:first-child {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-blue);
    line-height: 1.2;
}

.users-info span:last-child {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 400;
}

.sidebar-footer {
    margin-top: 20px;
    animation: slideInLeft 0.5s ease-out 0.4s backwards;
}

.logout-btn {
    width: 100%;
    padding: 12px;
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    border-radius: 10px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 15px;
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--error);
    transform: translateY(-2px);
}

.sidebar-footer p {
    font-size: 14px;
    color: var(--text-muted);
    text-align: center;
}

.heart {
    color: #EF4444;
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.main-content {
    flex: 1;
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.main-header {
    text-align: center;
    margin-bottom: 40px;
    animation: slideInDown 0.6s ease-out 0.1s backwards;
}

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

.main-header h2 {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.main-header p {
    font-size: 18px;
    color: var(--text-secondary);
    font-weight: 300;
}

form {
    background: linear-gradient(135deg, var(--card-bg) 0%, #151520 100%);
    border: 1px solid var(--card-border);
    padding: 50px;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    width: 100%;
    max-width: 700px;
    transform-style: preserve-3d;
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation: slideInUp 0.6s ease-out 0.2s backwards;
}

@keyframes slideInUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

form:hover {
    transform: translateY(-5px) rotateX(2deg);
}

.form-group {
    margin-bottom: 30px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 15px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: 16px 20px;
    background: var(--dark-bg);
    border: 2px solid var(--card-border);
    border-radius: 12px;
    font-size: 15px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.file-upload-wrapper {
    position: relative;
    width: 100%;
    cursor: pointer;
}

.file-upload-wrapper input[type="file"] {
    width: 100%;
    padding: 30px 20px;
    background: var(--dark-bg);
    border: 2px dashed var(--card-border);
    border-radius: 12px;
    font-size: 15px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1000;
}

.file-upload-text {
    width: 100%;
    padding: 30px 20px;
    background: var(--dark-bg);
    border: 2px dashed var(--card-border);
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    pointer-events: none;
}

.file-upload-wrapper:hover .file-upload-text {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.05);
}

.platform-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.platform-card {
    position: relative;
    background: var(--dark-bg);
    border: 2px solid var(--card-border);
    border-radius: 16px;
    padding: 30px 20px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    transform-style: preserve-3d;
    z-index: 10;
    user-select: none;
}

.platform-card:hover {
    border-color: rgba(59, 130, 246, 0.5);
    transform: translateY(-8px) rotateX(5deg);
    box-shadow: 0 15px 40px rgba(59, 130, 246, 0.2);
}

.platform-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.platform-card.active {
    border-color: var(--accent-blue);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0.05) 100%);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1), 0 10px 30px rgba(59, 130, 246, 0.2);
    transform: translateY(-5px) scale(1.02);
}

.platform-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

button {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--accent-blue) 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: left 0.5s ease;
}

button:hover::before {
    left: 100%;
}

button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(59, 130, 246, 0.5);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

button:disabled .btn-spinner {
    display: block;
}

.status {
    margin-top: 25px;
    padding: 18px 24px;
    border-radius: 12px;
    text-align: center;
    font-weight: 500;
    font-size: 15px;
    width: 100%;
    max-width: 700px;
    animation: statusIn 0.3s ease-out;
}

@keyframes statusIn {
    from {
        transform: translateY(-10px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.status.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.status.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error);
}

.status.loading {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--accent-blue);
}

@media (max-width: 1024px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--card-border);
        padding: 30px 20px;
    }
    
    .platform-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .main-content {
        padding: 40px 20px;
    }
    
    .main-header h2 {
        font-size: 28px;
    }
    
    form {
        padding: 30px 20px;
    }
    
    .auth-box {
        padding: 30px 20px;
    }
}