:root {
    --primary: #6f5fa7;
    --primary-hover: #5d4f92;

    --bg-start: #f4f5f8;
    --bg-end: #ece8f7;

    --card: #ffffff;

    --text: #202124;
    --muted: #6b7280;

    --border: #d7dbe3;

    --danger: #c0392b;

    --shadow:
        0 12px 30px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    min-height: 100%;
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    min-height: 100dvh;

    background:
        linear-gradient(
            135deg,
            var(--bg-start),
            var(--bg-end)
        );

    color: var(--text);

    font-family:
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
}

/* Page Container */

.auth-page {
    min-height: 100vh;
    min-height: 100dvh;

    display: flex;
    justify-content: center;
    align-items: center;

    padding:
        max(20px, env(safe-area-inset-top))
        max(20px, env(safe-area-inset-right))
        max(20px, env(safe-area-inset-bottom))
        max(20px, env(safe-area-inset-left));
}

/* Main Card */

.auth-card {
    width: 100%;
    max-width: 440px;

    background: var(--card);

    border: 1px solid var(--border);
    border-radius: 18px;

    padding: 34px;

    box-shadow: var(--shadow);
}

/* Title */

.auth-title {
    margin: 0;

    text-align: center;

    font-size: 36px;
    font-weight: 700;

    color: var(--primary);
}

.auth-subtitle {
    margin: 10px 0 28px;

    text-align: center;

    color: var(--muted);

    font-size: 15px;
}

/* Form Layout */

.stack-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.stack-form label {
    display: flex;
    flex-direction: column;

    gap: 6px;

    font-size: 14px;
    font-weight: 600;
}

/* Inputs */

input[type="text"],
input[type="password"],
input[type="email"] {
    width: 100%;

    padding: 13px 14px;

    border: 1px solid var(--border);
    border-radius: 10px;

    background: #fff;

    font-size: 15px;

    transition:
        border-color 0.15s ease,
        box-shadow 0.15s ease;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus {
    outline: none;

    border-color: var(--primary);

    box-shadow:
        0 0 0 3px rgba(111, 95, 167, 0.15);
}

/* Buttons */

.button-primary,
input[type="submit"] {
    width: 100%;

    border: none;

    background: var(--primary);
    color: white;

    padding: 14px 16px;

    border-radius: 10px;

    font-size: 15px;
    font-weight: 600;

    cursor: pointer;

    transition:
        background 0.15s ease,
        transform 0.05s ease;
}

.button-primary:hover,
input[type="submit"]:hover {
    background: var(--primary-hover);
}

.button-primary:active,
input[type="submit"]:active {
    transform: translateY(1px);
}

/* Errors */

.form-error {
    margin-bottom: 16px;

    padding: 12px;

    border-radius: 10px;

    background: #fdecea;
    color: var(--danger);

    font-size: 14px;
}

/* Footer */

.auth-footer {
    margin-top: 22px;

    text-align: center;

    color: var(--muted);

    font-size: 14px;
}

.auth-footer a {
    color: var(--primary);

    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Tablets */

@media (max-width: 768px) {

    .auth-page {
        padding:
            max(24px, env(safe-area-inset-top))
            max(24px, env(safe-area-inset-right))
            max(24px, env(safe-area-inset-bottom))
            max(24px, env(safe-area-inset-left));
    }

    .auth-card {
        width: min(100%, 520px);
        max-width: none;

        padding: 36px 30px;
    }

    .auth-title {
        font-size: 40px;
    }

    .auth-subtitle {
        font-size: 17px;
    }

    input[type="text"],
    input[type="password"],
    input[type="email"],
    input[type="submit"] {
        font-size: 16px;
        padding: 15px;
    }
}

/* Phones */

@media (max-width: 480px) {

    .auth-page {
        padding:
            max(16px, env(safe-area-inset-top))
            max(16px, env(safe-area-inset-right))
            max(16px, env(safe-area-inset-bottom))
            max(16px, env(safe-area-inset-left));
    }

    .auth-card {
        width: 100%;

        padding: 30px 22px;

        border-radius: 16px;
    }

    .auth-title {
        font-size: 32px;
    }

    .auth-subtitle {
        font-size: 15px;
    }
}