:root {
    --bg: black;
    --color: white;
    --red: darkred;
    --dim: gray;
    --border: #252525;
    --input-bg: #0a0a0a;
    --transition: 0.2s ease;
    --font: 'Nacelle', sans-serif;
}

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

body {
    background: var(--bg);
    color: var(--color);
    font-family: var(--font), sans-serif;
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

#login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.6s ease forwards;
}

.login-box {
    width: 100%;
    max-width: 400px;
    padding: 0 24px;
}

.login-label {
    font-size: 11px;
    letter-spacing: 0.2em;
    color: var(--dim);
    margin-bottom: 12px;
}

.login-box h1 {
    font-size: clamp(22px, 4vw, 32px);
    font-weight: 700;
    margin-bottom: 40px;
    line-height: 1.1;
}

.login-hint {
    font-size: 12px;
    color: var(--dim);
    margin-bottom: 16px;
}


.profile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 10;
}

.profile-header-left {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.welcome-label {
    font-size: 10px;
    letter-spacing: 0.2em;
    color: var(--dim);
}

#welcome-name {
    font-size: 18px;
    font-weight: 700;
}

.profile-main {
    max-width: 680px;
    margin: 0 auto;
    padding: 60px 24px 120px;
    animation: fadeUp 0.5s ease forwards;
}

.profile-main h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--dim);
    font-size: 14px;
    margin-bottom: 48px;
}

#profile-form {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-size: 11px;
    letter-spacing: 0.15em;
    color: var(--dim);
    text-transform: uppercase;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
select,
textarea {
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--color);
    font-family: var(--font), sans-serif;
    font-size: 15px;
    padding: 12px 14px;
    border-radius: 0;
    outline: none;
    width: 100%;
    transition: border-color var(--transition);
    appearance: none;
    -webkit-appearance: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--color);
}

input::placeholder,
textarea::placeholder {
    color: #333;
}

select option {
    background: #111;
}

textarea {
    resize: vertical;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    opacity: 0.4;
    cursor: pointer;
}

.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color);
    text-transform: none;
    letter-spacing: 0;
    cursor: pointer;
}

.radio-label input[type="radio"] {
    width: 14px;
    height: 14px;
    accent-color: var(--red);
    cursor: pointer;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--color);
    text-transform: none;
    letter-spacing: 0;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 14px;
    height: 14px;
    accent-color: var(--red);
    cursor: pointer;
}

button {
    background: none;
    border: 1px solid var(--color);
    color: var(--color);
    font-family: var(--font), sans-serif;
    font-size: 14px;
    padding: 12px 28px;
    cursor: pointer;
    letter-spacing: 0.1em;
    transition: background var(--transition), color var(--transition);
    align-self: flex-start;
}

button:hover {
    background: var(--color);
    color: var(--bg);
}

#logout-btn {
    border-color: var(--border);
    color: var(--dim);
    padding: 8px 16px;
    font-size: 12px;
}

#logout-btn:hover {
    border-color: var(--red);
    color: var(--red);
    background: none;
}

.error-msg {
    color: var(--red);
    font-size: 13px;
    min-height: 18px;
}

.success-msg {
    color: #4caf50;
    font-size: 13px;
    min-height: 18px;
}

.field-error {
    color: var(--red);
    font-size: 12px;
    min-height: 16px;
}

input.invalid {
    border-color: var(--red);
}

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

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

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .profile-header {
        padding: 16px 20px;
    }

    .profile-main {
        padding: 40px 20px 80px;
    }
}