@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");

:root {
    color-scheme: light;
    --page-bg: #eceff3;
    --page-accent: #f3f6fa;
    --card-bg: #f8fafc;
    --card-border: #cfd9e6;
    --text: #1f3556;
    --muted: #5f7699;
    --primary: #00baf2;
    --primary-strong: #00a5db;
    --primary-text: #ffffff;
    --input-bg: #eef3f8;
    --input-border: #c4d1e0;
    --input-focus: rgba(0, 186, 242, 0.2);
    --secondary-bg: #eef3f8;
    --secondary-bg-hover: #e4ebf3;
    --danger-bg: #fff0f0;
    --danger-text: #9f1239;
    --danger-border: #fecdd3;
    --success-bg: #ecfdf5;
    --success-text: #047857;
    --success-border: #a7f3d0;
    --shadow: 0 10px 24px rgba(39, 63, 94, 0.1);
    --font-ui: "Inter", "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --page-bg: #030a1a;
    --page-accent: #102544;
    --card-bg: #0b1730;
    --card-border: #173258;
    --text: #d4e6ff;
    --muted: #7e96bc;
    --primary: #00cfff;
    --primary-strong: #18dcff;
    --primary-text: #041424;
    --input-bg: #0f1f3d;
    --input-border: #21436f;
    --input-focus: rgba(0, 207, 255, 0.24);
    --secondary-bg: #0f1f3d;
    --secondary-bg-hover: #142b51;
    --danger-bg: #2d1220;
    --danger-text: #ffb1c1;
    --danger-border: #7a1f38;
    --success-bg: #0f3127;
    --success-text: #9ff2d4;
    --success-border: #146448;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

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

html {
    min-height: 100%;
}

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 18px;
    background: var(--page-bg);
    color: var(--text);
    font-family: var(--font-ui);
    transition: background 0.25s ease, color 0.25s ease;
}

button,
input,
select,
textarea {
    font-family: var(--font-ui);
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 50;
    width: 44px;
    height: 44px;
    border: 1px solid var(--card-border);
    border-radius: 999px;
    background: var(--card-bg);
    color: var(--text);
    box-shadow: 0 10px 26px rgba(0, 0, 0, 0.12);
    cursor: pointer;
    font-size: 21px;
    line-height: 1;
    display: grid;
    place-items: center;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.theme-toggle:hover {
    transform: translateY(-1px);
    border-color: var(--primary);
}

.theme-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.theme-icon .icon-sun,
.theme-icon .icon-moon {
    display: none;
}

.theme-toggle[data-theme="dark"] .theme-icon .icon-sun,
.theme-toggle[data-theme="light"] .theme-icon .icon-moon {
    display: inline-block;
}

.login-container {
    width: min(100%, 430px);
}

.login-box {
    width: 100%;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 36px;
    box-shadow: var(--shadow);
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.logo {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--card-border);
}

.logo .brand-mark {
    font-size: 48px;
    line-height: 1;
    flex-shrink: 0;
}

.logo > div {
    text-align: left;
}

.logo h1 {
    color: var(--primary);
    font-size: 36px;
    line-height: 1.1;
    margin-bottom: 8px;
    font-weight: 750;
}

.logo p {
    color: var(--muted);
    font-size: 14px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.form-group label {
    color: var(--text);
    font-weight: 600;
    font-size: 14px;
}

.form-group input {
    min-height: 46px;
    padding: 12px 14px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text);
    font-size: 16px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--input-focus);
}

.password-field {
    position: relative;
}

.password-field input {
    width: 100%;
    padding-right: 44px;
}

.password-toggle {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--muted);
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.password-toggle:hover {
    background: var(--secondary-bg-hover);
    color: var(--text);
}

.btn-login,
.btn-ok {
    min-height: 46px;
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    background: var(--primary);
    color: var(--primary-text);
    font-size: 17px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-login:hover,
.btn-ok:hover {
    background: var(--primary-strong);
    transform: translateY(-1px);
    box-shadow: 0 12px 24px var(--input-focus);
}

.btn-login:active,
.btn-ok:active {
    transform: translateY(0);
}

.btn-login:disabled,
.btn-ok:disabled {
    cursor: wait;
    opacity: 0.72;
    transform: none;
    box-shadow: none;
}

.error-message,
.success-message {
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    display: none;
}

.error-message {
    background: var(--danger-bg);
    color: var(--danger-text);
    border: 1px solid var(--danger-border);
}

.success-message {
    background: var(--success-bg);
    color: var(--success-text);
    border: 1px solid var(--success-border);
}

.error-message.show,
.success-message.show {
    display: block;
    animation: slideIn 0.22s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    inset: 0;
    background: rgba(0, 0, 0, 0.52);
    animation: fadeIn 0.22s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
}

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

.modal-content {
    width: min(100%, 400px);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 36px;
    text-align: center;
    position: relative;
    animation: slideUp 0.24s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(24px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    position: absolute;
    right: 14px;
    top: 12px;
    color: var(--muted);
    font-size: 29px;
    font-weight: 700;
    cursor: pointer;
}

.close:hover {
    color: var(--text);
}

.modal-body {
    padding: 14px 0 0;
}

.success-icon {
    color: var(--success-text);
    font-size: 57px;
    margin-bottom: 18px;
    animation: scaleIn 0.42s ease;
}

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

.modal-body h2 {
    color: var(--text);
    margin-bottom: 12px;
}

.modal-body p {
    color: var(--muted);
    margin-bottom: 24px;
}

@media (max-width: 520px) {
    body {
        align-items: flex-start;
        padding-top: 84px;
    }

    .theme-toggle {
        top: 16px;
        right: 16px;
    }

    .login-box {
        padding: 28px 20px;
    }

    .logo h1 {
        font-size: 29px;
    }
}