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

:root {
    color-scheme: light;
    --page-bg: #f5f6f8;
    --page-accent: #eef1f5;
    --card-bg: #ffffff;
    --card-border: #e0e3e8;
    --text: #2c2c2c;
    --muted: #69717d;
    --primary: #5f7f9f;
    --primary-strong: #526f8e;
    --primary-text: #ffffff;
    --input-bg: #ffffff;
    --input-border: #e0e3e8;
    --input-focus: rgba(95, 127, 159, 0.14);
    --secondary-bg: #f0f2f5;
    --secondary-bg-hover: #e8ebef;
    --danger-bg: #fff0f0;
    --danger-text: #9f1239;
    --danger-border: #fecdd3;
    --success-bg: #ecfdf5;
    --success-text: #047857;
    --success-border: #a7f3d0;
    --shadow: 0 12px 30px rgba(36, 42, 52, 0.08);
    --font-ui: "Inter", "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --page-bg: #15181d;
    --page-accent: #1c2027;
    --card-bg: #1d2229;
    --card-border: #303843;
    --text: #e4e7eb;
    --muted: #9aa3ad;
    --primary: #7d96ad;
    --primary-strong: #8ca8bf;
    --primary-text: #11161c;
    --input-bg: #20262e;
    --input-border: #343d49;
    --input-focus: rgba(125, 150, 173, 0.18);
    --secondary-bg: #242a33;
    --secondary-bg-hover: #2b333d;
    --danger-bg: #2d1220;
    --danger-text: #ffb1c1;
    --danger-border: #7a1f38;
    --success-bg: #0f3127;
    --success-text: #9ff2d4;
    --success-border: #146448;
    --shadow: 0 20px 48px rgba(0, 0, 0, 0.32);
}

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

html {
    min-height: 100%;
}

body {
    min-height: 100dvh;
    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: color-mix(in srgb, var(--primary) 50%, var(--card-border));
}

.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: 28px;
    box-shadow: var(--shadow);
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-bottom: 22px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--card-border);
}

.brand-logo {
    width: 178px;
    height: 178px;
    object-fit: contain;
    flex-shrink: 0;
    border-radius: 999px;
}

.logo .brand-mark {
    font-size: 48px;
    line-height: 1;
    flex-shrink: 0;
    display: none;
    width: 178px;
    height: 178px;
    border-radius: 999px;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    background: var(--secondary-bg);
    border: 1px solid var(--card-border);
}

.logo.logo-image-fallback .brand-mark {
    display: inline-flex;
}

.brand-logo.hidden {
    display: none;
}

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

.brand-text {
    min-width: 0;
}

.logo h1 {
    color: var(--text);
    font-size: 36px;
    line-height: 1.1;
    margin-bottom: 8px;
    font-weight: 600;
    letter-spacing: -0.7px;
}

.brand-title-single {
    margin: 0;
    font-family: "Inter", "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
    font-weight: 600;
    font-size: 18px;
    line-height: 1.05;
    letter-spacing: 0;
    white-space: nowrap;
    color: var(--muted);
}

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

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

.form-group label {
    color: var(--muted);
    font-weight: 500;
    font-size: 13px;
}

.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: color-mix(in srgb, var(--primary) 58%, var(--input-border));
    box-shadow: 0 0 0 3px var(--input-focus);
}

.btn-login,
.btn-ok {
    min-height: 46px;
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    background: var(--primary);
    color: var(--primary-text);
    font-size: 16px;
    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 10px 22px rgba(36, 42, 52, 0.12);
}

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

.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: center;
        padding: 74px 14px 18px;
    }

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

    .login-box {
        padding: 24px 18px;
    }

    .brand-logo {
        width: 148px;
        height: 148px;
    }

    .logo .brand-mark {
        width: 148px;
        height: 148px;
        font-size: 30px;
    }

    .brand-title-single {
        font-size: 17px;
        white-space: normal;
    }
}