:root[data-theme="dark"] {
    --color-scheme: dark;
    --bg-main: #242424;
    --bg-card: #2b2b2b;
    --text-main: #dce4ee;
    --text-muted: #a8a8a8;
    --accent-blue: #1f6aa5;
    --accent-hover: #144870;
    --border-color: #333333;
    --input-bg: #343638;
    --panel-radius: 14px;
    --element-radius: 7px;
}
:root[data-theme="light"] {
    --color-scheme: light;
    --bg-main: #ebebeb;
    --bg-card: #f9f9fa;
    --text-main: #242424;
    --text-muted: #555555;
    --accent-blue: #3a7ebf;
    --accent-hover: #325d88;
    --border-color: #cccccc;
    --input-bg: #ffffff;
    --panel-radius: 14px;
    --element-radius: 7px;
}
* { box-sizing: border-box; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
html, body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { display: flex; justify-content: center; align-items: center; height: 100vh; background-color: var(--bg-main); margin: 0; -webkit-user-select: none; -ms-user-select: none; user-select: none; }
.btn { border: none; border-radius: var(--element-radius); padding: 0 15px; cursor: pointer; font-weight: bold; transition: 0.05s; color: white; display: flex; align-items: center; justify-content: center; white-space: nowrap; flex-shrink: 0; height: 32px; touch-action: manipulation; }
.btn.primary { background-color: var(--accent-blue); }
.btn.primary:hover { background-color: var(--accent-hover); }
.login-card { background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--panel-radius); padding: 40px; width: 100%; max-width: 400px; box-shadow: 0 10px 30px rgba(0,0,0,0.5); display: flex; flex-direction: column; gap: 20px; }
html[data-theme="light"] .login-card { box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.login-header { text-align: center; margin-bottom: 10px; }
.login-header h1 { margin: 0 0 10px 0; font-size: 22px; color: var(--text-main); font-weight: bold; }
.login-header p { margin: 0; color: var(--text-muted); font-size: 13px; }
.input-group { display: flex; flex-direction: column; gap: 8px; }
.input-group label { font-weight: bold; font-size: 13px; color: var(--text-main); }
.input-group input[type="text"],
.input-group input[type="password"] { color-scheme: var(--color-scheme); background-color: var(--input-bg); border: 1px solid var(--border-color); color: var(--text-main); padding: 10px 12px; border-radius: var(--element-radius); outline: none; font-size: 14px !important; transition: border-color 0.2s; height: 40px; }
.input-group input[type="text"]:focus,
.input-group input[type="password"]:focus { border-color: var(--accent-blue); }
@keyframes onAutoFillStart { from { opacity: 1; } to { opacity: 1; } }
input:-webkit-autofill, input:-webkit-autofill:hover, input:-webkit-autofill:focus, input:-webkit-autofill:active { -webkit-box-shadow: 0 0 0 1000px var(--input-bg) inset !important; -webkit-text-fill-color: var(--text-main) !important; caret-color: var(--text-main) !important; border: 1px solid var(--border-color) !important; border-radius: var(--element-radius) !important; background-clip: padding-box !important; animation-name: onAutoFillStart !important; }
input:autofill, input:-moz-autofill, input:-moz-autofill-preview { background-color: var(--input-bg) !important; background-image: none !important; color: var(--text-main) !important; -webkit-text-fill-color: var(--text-main) !important; caret-color: var(--text-main) !important; border: 1px solid var(--border-color) !important; border-radius: var(--element-radius) !important; box-shadow: none !important; filter: none !important; animation-name: onAutoFillStart !important; }
input::-webkit-credentials-auto-fill-button, input::-webkit-contacts-auto-fill-button, input::-ms-reveal, input::-ms-clear { display: none !important; visibility: hidden !important; pointer-events: none !important; position: absolute !important; right: 0 !important; }
input[type="password"]::-ms-reveal, input[type="password"]::-ms-clear, input[type="password"]::-webkit-reveal, input[type="password"]::-webkit-clear-button { display: none !important; width: 0 !important; height: 0 !important; }
.checkbox-group { display: flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; margin-top: -5px; margin-bottom: 5px; font-size: 13px; color: var(--text-main); }
.t-checkbox { appearance: none; -webkit-appearance: none; width: 16px; height: 16px; background-color: var(--input-bg); border: 1px solid var(--border-color); border-radius: 3px; margin: 0; cursor: pointer; position: relative; display: flex; align-items: center; justify-content: center; transition: background-color 0.2s, border-color 0.2s; flex-shrink: 0; }
.t-checkbox:checked { background-color: var(--accent-blue); border-color: var(--accent-blue); }
.t-checkbox:checked::after { content: ''; position: absolute; width: 4px; height: 8px; border: solid white; border-width: 0 2px 2px 0; transform: rotate(45deg); margin-top: -2px; }
#login-error { color: var(--text-main); font-size: 13px; text-align: center; min-height: 20px; font-weight: bold; -webkit-user-select: text; -ms-user-select: text; user-select: text; }
.btn-login { height: 40px; font-size: 14px !important; margin-top: 5px; }
.password-container { position: relative; display: flex; width: 100%; }
.password-container input[type="password"], .password-container input[type="text"] { width: 100%; padding-right: 40px !important; }
.password-toggle-icon { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); cursor: pointer; color: var(--text-muted); display: none; align-items: center; justify-content: center; width: 18px !important; height: 18px !important; transition: none !important; z-index: 2; }
.password-toggle-icon:hover { color: var(--text-muted) !important; }
.theme-toggle-container { position: absolute; top: 20px; right: 20px; }
.theme-toggle-btn { background: transparent; border: none; color: var(--text-muted); cursor: pointer; padding: 8px; border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: background-color 0.2s, color 0.2s; }
.theme-toggle-btn svg { width: 22px; height: 22px; }
html[data-theme="dark"] .icon-moon { display: none; }
html[data-theme="dark"] .icon-sun { display: block; }
html[data-theme="light"] .icon-moon { display: block; }
html[data-theme="light"] .icon-sun { display: none; }