:root {
    --bg-color: #0f1014;
    --card-bg: #18191f;
    --text-color: #ffffff;
    --text-muted: #8b9bb4;
    --primary-color: #3b82f6; /* Основной акцентный цвет */
    --primary-hover: #2563eb;
    --error-color: #ef4444;
    --font-main: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

/* Легкая фоновая анимация (градиентное пятно) */
.background-animation {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
    pointer-events: none;
}

.login-container {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.05);
    width: 100%;
    max-width: 400px;
    animation: fadeIn 0.6s ease-out;
}

.brand-title {
    font-size: 1.8rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.accent {
    color: var(--primary-color);
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

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

/* Стилизация полей ввода с плавающим лейблом */
input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s, background 0.3s;
}

input:focus {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.05);
}

label {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    transition: 0.3s ease all;
    font-size: 0.95rem;
    background: transparent;
}

/* Анимация лейбла при фокусе или заполнении */
input:focus ~ label,
input:not(:placeholder-shown) ~ label {
    top: -8px;
    left: 10px;
    font-size: 0.75rem;
    color: var(--primary-color);
    background: var(--card-bg);
    padding: 0 4px;
}

.show-pass-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.show-pass-btn:hover {
    opacity: 1;
}

.actions {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1.5rem;
}

.forgot-pass {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-decoration: none;
    transition: color 0.2s;
}

.forgot-pass:hover {
    color: var(--primary-color);
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.1s;
    position: relative;
    overflow: hidden;
}

.submit-btn:hover {
    background: var(--primary-hover);
}

.submit-btn:active {
    transform: scale(0.98);
}

/* Лоадер для кнопки */
.loader {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.submit-btn.loading .btn-text {
    visibility: hidden;
}

.submit-btn.loading .loader {
    display: block;
}

.footer {
    position: absolute;
    bottom: 20px;
    font-size: 0.8rem;
    color: var(--text-muted);
    opacity: 0.7;
    transition: opacity 0.3s;
}

.footer:hover {
    opacity: 1;
}

.footer a {
    color: inherit;
    text-decoration: none;
    font-weight: 600;
}

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

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}