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

:root {
    /* Light Theme (Default) */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-hover: #e2e8f0;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    
    --accent-primary: #3b82f6;
    --accent-secondary: #6366f1;
    --accent-hover: #2563eb;
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    --error-color: #ef4444;
    --success-color: #10b981;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-hover: #475569;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    
    --border-color: #334155;
    --border-hover: #475569;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Animated Background */
.login-wrapper {
    position: relative;
    width: 100%;
    max-width: 480px;
    z-index: 1;
}

.bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(99, 102, 241, 0.08) 0%, transparent 50%);
    z-index: 0;
    animation: patternMove 20s ease-in-out infinite;
}

@keyframes patternMove {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(20px, -20px) scale(1.1);
    }
}

.bg-gradient {
    position: fixed;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    z-index: 0;
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Login Card */
.login-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 48px 40px;
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 1;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    backdrop-filter: blur(10px);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Logo Section */
.login-header {
    margin-bottom: 40px;
    text-align: center;
}

.logo-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    width: 64px;
    height: 64px;
    background: var(--accent-gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
    box-shadow: 0 8px 16px rgba(59, 130, 246, 0.3);
    animation: float 3s ease-in-out infinite;
}

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

.logo-text {
    text-align: center;
}

.brand-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    margin-bottom: 4px;
    text-transform: lowercase;
}

.brand-tagline {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

/* Form Styles */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-wrapper label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-wrapper label i {
    font-size: 14px;
    color: var(--accent-primary);
}

.input-wrapper input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.2s ease;
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-secondary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
    transform: translateY(-1px);
}

.input-wrapper input::placeholder {
    color: var(--text-tertiary);
}

/* Submit Button */
.submit-btn {
    width: 100%;
    padding: 16px 24px;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 8px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

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

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

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

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

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

.submit-btn:hover .btn-icon {
    transform: translateX(4px);
}

/* Spinner */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Error Message */
.error-message {
    padding: 12px 16px;
    background: rgba(239, 68, 68, 0.1);
    border: 2px solid var(--error-color);
    border-radius: 10px;
    color: var(--error-color);
    font-size: 14px;
    text-align: center;
    font-weight: 500;
    animation: shake 0.4s ease;
}

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

/* Login Footer */
.login-footer {
    margin-top: 32px;
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.login-footer p {
    font-size: 12px;
    color: var(--text-tertiary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.modal-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    width: 90%;
    max-width: 420px;
    box-shadow: var(--shadow-xl);
    animation: slideDown 0.3s ease;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

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

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: var(--bg-tertiary);
    border: none;
    font-size: 16px;
    color: var(--text-secondary);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-body {
    padding: 24px;
    text-align: center;
}

.modal-body p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.modal-body strong {
    color: var(--accent-primary);
    font-weight: 600;
}

.telegram-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #0088cc 0%, #229ED9 100%);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 136, 204, 0.3);
}

.telegram-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 136, 204, 0.4);
}

.telegram-btn i {
    font-size: 18px;
}

/* Responsive */
@media (max-width: 480px) {
    .login-card {
        padding: 32px 24px;
        border-radius: 20px;
    }

    .brand-title {
        font-size: 28px;
    }

    .logo-icon {
        width: 56px;
        height: 56px;
        font-size: 24px;
    }

    .modal-container {
        width: 95%;
        margin: 20px;
    }
}