/* ============================================
   СУЧАСНИЙ ДИЗАЙН ДЛЯ СИСТЕМИ БІЛІНГУ
   ============================================ */

:root {
    --primary-color: #464c6e;
    --primary-dark: #363b56;
    --primary-light: #5d6488;
    --success-color: #5fcf80;
    --success-dark: #3ac162;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #3498db;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e1e8ed;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, #464c6e 0%, #5d6488 100%);
    --gradient-success: linear-gradient(135deg, #5fcf80 0%, #3ac162 100%);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-light);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   СТОРІНКА ВХОДУ
   ============================================ */

.login-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #464c6e 0%, #5d6488 50%, #6b7399 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    pointer-events: none;
}

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

.login-page .logo {
    margin-bottom: 40px;
    z-index: 1;
    animation: fadeInDown 0.6s ease-out;
}

.login-page .logo img {
    width: 180px;
    height: auto;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.2));
    transition: transform 0.3s ease;
}

.login-page .logo img:hover {
    transform: scale(1.05);
}

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

#login, #signup, #device {
    width: 100%;
    max-width: 420px;
    background: var(--bg-white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    z-index: 1;
    animation: fadeInUp 0.6s ease-out 0.2s both;
    position: relative;
    overflow: hidden;
}

#login::before, #signup::before, #device::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

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

.login-page form {
    margin: 0;
}

.login-page form label {
    display: block;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-dark);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 12px;
}

.login-page form .input-wrapper {
    position: relative;
    margin-bottom: 28px;
}

.login-page form .input-wrapper label {
    display: block;
    font-weight: 600;
    font-size: 12px;
    color: var(--text-dark);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    transition: var(--transition);
}

.login-page form .input-wrapper:focus-within label {
    color: var(--primary-color);
}

/* Іконки для полів вводу */
.login-page form .input-wrapper::before {
    content: '';
    position: absolute;
    left: 18px;
    top: 72%;
    transform: translateY(-50%);
    width: 15px;
    height: 15px;
    z-index: 2;
    pointer-events: none;
    transition: var(--transition);
}

.login-page form .input-wrapper.username::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 448 512' fill='%237f8c8d'%3E%3Cpath d='M224 256c70.7 0 128-57.3 128-128S294.7 0 224 0 96 57.3 96 128s57.3 128 128 128zm89.6 32h-16.7c-22.2 10.2-46.9 16-72.9 16s-50.6-5.8-72.9-16h-16.7C60.2 288 0 348.2 0 422.4V464c0 26.5 21.5 48 48 48h352c26.5 0 48-21.5 48-48v-41.6c0-74.2-60.2-134.4-134.4-134.4z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.login-page form .input-wrapper.password::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 448 512' fill='%237f8c8d'%3E%3Cpath d='M400 224h-24v-72C376 68.2 307.8 0 224 0S72 68.2 72 152v72H48c-26.5 0-48 21.5-48 48v192c0 26.5 21.5 48 48 48h352c26.5 0 48-21.5 48-48V272c0-26.5-21.5-48-48-48zM264 392c0 22.1-17.9 40-40 40s-40-17.9-40-40v-48c0-22.1 17.9-40 40-40s40 17.9 40 40v48zm32-168H152v-72c0-39.7 32.3-72 72-72s72 32.3 72 72v72z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.login-page form .input-wrapper.code::before {
    display: none;
}

.login-page form .input-wrapper:focus-within::before {
    filter: brightness(0) saturate(100%) invert(30%) sepia(15%) saturate(1200%) hue-rotate(200deg) brightness(0.7);
}

/* Поля вводу */
.login-page form input[type="text"],
.login-page form input[type="password"],
.login-page form input[type="email"] {
    width: 100%;
    padding: 16px 15px 16px 44px;
}

/* Поле коду без іконки зліва */
.login-page form .input-wrapper.code input[type="text"] {
    padding-left: 15px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 15px;
    font-weight: 400;
    transition: var(--transition);
    background: var(--bg-white);
    color: var(--text-dark);
    outline: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}

.login-page form input[type="text"]:hover,
.login-page form input[type="password"]:hover,
.login-page form input[type="email"]:hover {
    border-color: var(--primary-light);
    box-shadow: 0 4px 8px rgba(70, 76, 110, 0.08);
}

.login-page form input[type="text"]:focus,
.login-page form input[type="password"]:focus,
.login-page form input[type="email"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(70, 76, 110, 0.12), 0 4px 12px rgba(70, 76, 110, 0.15);
    transform: translateY(-1px);
    background: #ffffff;
}

.login-page form input[type="text"]:focus::placeholder,
.login-page form input[type="password"]:focus::placeholder,
.login-page form input[type="email"]:focus::placeholder {
    opacity: 0.5;
}

.login-page form input[type="text"]::placeholder,
.login-page form input[type="password"]::placeholder,
.login-page form input[type="email"]::placeholder {
    color: var(--text-light);
    opacity: 0.7;
    font-weight: 400;
    transition: opacity 0.3s ease;
}

/* Валідація полів */
.login-page form input[type="text"]:valid:not(:placeholder-shown),
.login-page form input[type="email"]:valid:not(:placeholder-shown) {
    border-color: var(--success-color);
}

.login-page form input[type="text"]:invalid:not(:placeholder-shown):not(:focus),
.login-page form input[type="email"]:invalid:not(:placeholder-shown):not(:focus) {
    border-color: var(--danger-color);
}

/* Кнопка показу пароля */
.login-page form .input-wrapper.password .password-toggle {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 8px;
    z-index: 3;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.login-page form .input-wrapper.password .password-toggle:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.login-page form .input-wrapper.password .password-toggle:active {
    transform: translateY(-50%) scale(0.95);
}

.login-page form .input-wrapper.password .password-toggle i {
    font-size: 18px;
    transition: var(--transition);
}

/* Індикатор валідації (додається через JavaScript) */
.login-page form .input-wrapper .validation-icon {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    opacity: 0;
    transition: var(--transition);
    z-index: 2;
    pointer-events: none;
}

.login-page form .input-wrapper.password .validation-icon {
    right: 60px; /* Зсуваємо вліво від кнопки показу пароля */
}

.login-page form .input-wrapper .validation-icon.valid {
    opacity: 1;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512' fill='%235fcf80'%3E%3Cpath d='M504 256c0 136.967-111.033 248-248 248S8 392.967 8 256 119.033 8 256 8s248 111.033 248 248zM227.314 387.314l184-184c6.248-6.248 6.248-16.379 0-22.627l-22.627-22.627c-6.248-6.249-16.379-6.249-22.628 0L216 308.118l-70.059-70.059c-6.248-6.248-16.379-6.248-22.627 0l-22.627 22.627c-6.248 6.248-6.248 16.379 0 22.627l104 104c6.249 6.249 16.379 6.249 22.628.001z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.login-page form .input-wrapper .validation-icon.invalid {
    opacity: 1;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512' fill='%23e74c3c'%3E%3Cpath d='M256 8C119.033 8 8 119.033 8 256s111.033 248 248 248 248-111.033 248-248S392.967 8 256 8zm0 448c-110.532 0-200-89.451-200-200 0-110.531 89.451-200 200-200 110.532 0 200 89.451 200 200 0 110.532-89.451 200-200 200zm107.351-101.064c-9.614 9.612-25.207 9.612-34.82 0L256 289.39l-72.529 72.546c-9.614 9.612-25.208 9.612-34.82 0-9.612-9.611-9.612-25.207 0-34.819L221.18 254.57l-72.529-72.546c-9.612-9.612-9.612-25.207 0-34.819 9.614-9.612 25.207-9.612 34.82 0L256 219.751l72.529-72.546c9.614-9.612 25.207-9.612 34.82 0 9.612 9.612 9.612 25.207 0 34.819L290.82 254.57l72.529 72.546c9.612 9.612 9.612 25.207 0 34.819z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Анімація при введенні */
.login-page form input[type="text"].has-value,
.login-page form input[type="password"].has-value,
.login-page form input[type="email"].has-value {
    padding-left: 52px;
}

/* Покращення для disabled стану */
.login-page form input:disabled {
    background: var(--bg-light);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Ефект при натисканні */
.login-page form input[type="text"]:active,
.login-page form input[type="password"]:active,
.login-page form input[type="email"]:active {
    transform: scale(0.998);
}

.login-page .button {
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
    display: block;
    background: var(--gradient-success);
    border: none;
    color: white;
    font-weight: 600;
    font-size: 16px;
    padding: 16px 24px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(95, 207, 128, 0.4);
    position: relative;
    box-sizing: border-box;
    overflow: hidden;
}

.login-page .button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.login-page .button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(95, 207, 128, 0.5);
}

.login-page .button:active {
    transform: translateY(0);
}

.login-page .button:hover::before {
    width: 300px;
    height: 300px;
}

.login-page .errorMsg {
    background: #fee;
    color: var(--danger-color);
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid var(--danger-color);
    font-size: 14px;
    animation: shake 0.5s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.login-page .errorMsg::before {
    content: '\f06a';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    font-size: 16px;
}

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

/* ============================================
   СТОРІНКА ПІДТВЕРДЖЕННЯ ПРИСТРОЮ
   ============================================ */

#device {
    text-align: center;
}

#device form {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#device p {
    color: var(--text-light);
    font-size: 15px;
    margin-bottom: 30px;
    line-height: 1.8;
}

.qr-code-url {
    margin: 30px 0;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 12px;
    display: inline-block;
}

.qr-code-url img {
    max-width: 200px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

/* ============================================
   ЗАГАЛЬНІ СТИЛІ
   ============================================ */

.header {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header img {
    max-height: 50px;
    width: auto;
}

.main-content {
    padding: 40px 0;
    min-height: calc(100vh - 200px);
}

.footer {
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
    padding: 30px 20px;
    font-size: 13px;
    margin-top: auto;
}

.footer a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: white;
}

/* ============================================
   КНОПКИ
   ============================================ */

.button {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.button.primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(70, 76, 110, 0.4);
}

.button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(70, 76, 110, 0.5);
}

.button.success {
    background: var(--gradient-success);
    color: white;
    box-shadow: 0 4px 15px rgba(95, 207, 128, 0.4);
}

.button.success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(95, 207, 128, 0.5);
}

/* ============================================
   КАРТКИ ТА КОНТЕЙНЕРИ
   ============================================ */

.card {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow-md);
    margin-bottom: 30px;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

/* ============================================
   АДАПТИВНІСТЬ
   ============================================ */

@media (max-width: 768px) {
    #login, #signup, #device {
        padding: 30px 24px;
        max-width: 100%;
    }

    .login-page {
        padding: 15px;
    }

    .login-page .logo img {
        width: 140px;
    }

    .main-content {
        padding: 20px 0;
    }

    .card {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    #login, #signup, #device {
        padding: 24px 20px;
        border-radius: 12px;
    }

    .login-page form input[type="text"],
    .login-page form input[type="password"],
    .login-page form input[type="email"] {
        padding: 12px 14px 12px 44px;
        font-size: 14px;
    }

    .login-page .button {
        padding: 14px 20px;
        font-size: 14px;
    }
}

/* ============================================
   УТИЛІТИ
   ============================================ */

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

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

/* ============================================
   АНІМАЦІЇ ЗАВАНТАЖЕННЯ
   ============================================ */

.loading {
    display: inline-block;
    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;
}

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

/* ============================================
   ПОКРАЩЕННЯ ДЛЯ ПЛАТЕЖІВ
   ============================================ */

.payment-container {
    max-width: 600px;
    margin: 40px auto;
    background: var(--bg-white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.payment-info {
    background: var(--bg-light);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    border-left: 4px solid var(--primary-color);
}

.payment-info h3 {
    margin: 0 0 10px 0;
    color: var(--text-dark);
    font-size: 18px;
}

.payment-info p {
    margin: 5px 0;
    color: var(--text-light);
    font-size: 14px;
}