:root {
    --stacking-level-header: 1;

    --color-light-grey: #D9DCD8;
    --color-blue: #49E8FF;
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-bg: #F5F5F5;
    --color-bg-alt: #000000;
    --color-border: #A2A2A2;

    --border: 1px solid var(--color-border);

    --color-text-secondary: #DADADA;
    --color-text-tertiary: #494949;

    --breakpoint-mobile: 576px;

    --content-margin: 25px;
    --content-width: min(1200px, 100vw);

    --font-size-sm: 12px;
    --font-size-md: 14px;
    --font-size-lg: 20px;
    --font-size-xl: 36px;
    --font-size-xxl: 48px;

    --spacing-sm: 4px;
    --spacing-md: 8px;
    --spacing-lg: 12px;
}

/* desktop styles */
@media screen and (width >= 567px) {
    :root {
        --content-margin: 50px;

        --font-size-sm: 16px;
        --font-size-md: 18px;
        --font-size-lg: 36px;
        --font-size-xl: 48px;
        --font-size-xxl: 76px;
    }
}

* {
    font-family: "Inter", sans-serif;
}

html {
    background-color: var(--color-black);
}

h1, h2, h3 {
    font-family: "Libre Caslon Text", serif;
    font-weight: 400;
    font-style: normal;
}

a {
    text-decoration: none;
    color: var(--color-white);
}

header {
}

main {
    margin: 0 auto;
}

footer {
    max-width: var(--content-width);
    margin: 0 auto;
}

.content {
    max-width: var(--content-width);
}

main > * {
    background-color: var(--color-bg);
    color: var(--color-black);

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

    &:nth-child(even) {
        background-color: var(--color-bg-alt);
        color: var(--color-white);

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

section {
    padding: var(--content-margin);
    margin: 0 auto;
    max-width: var(--content-width);

    & > header {
        display: flex;
        flex-flow: column nowrap;
        align-items: center;
        margin-bottom: var(--content-margin);

        & > .sub {
            margin-top: 15px;
        }
    }
}

/* Flash messages */
.flash {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    padding: 15px;
    border-radius: 30px;
    font-size: var(--font-size-sm);
    font-weight: bold;
    letter-spacing: 0.05em;
    text-align: center;
    white-space: nowrap;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: flash-in-out 4s ease forwards;
}

.flash--notice {
    background-color: var(--color-blue);
    color: var(--color-black);
}

.flash--alert {
    background-color: #ff4d4d;
    color: var(--color-white);
}

@keyframes flash-in-out {
    0%   { opacity: 0; transform: translateX(-50%) translateY(-10px); }
    10%  { opacity: 1; transform: translateX(-50%) translateY(0); }
    70%  { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(-10px); }
}

/* Shared form element styles */
label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 6px;

    .required {
        color: var(--color-blue);
    }
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="password"],
textarea,
select {
    display: block;
    width: 100%;
    padding: 12px 16px;
    border: 2px solid transparent;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.08);
    color: inherit;
    font-family: inherit;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    box-sizing: border-box;

    &::placeholder {
        color: rgba(255, 255, 255, 0.35);
    }

    &:focus {
        outline: none;
        border-color: var(--color-blue);
        background-color: rgba(255, 255, 255, 0.12);
    }
}

textarea {
    resize: vertical;
    min-height: 120px;
}

/* Validation error highlight */
.field_with_errors {
    input,
    textarea,
    select {
        border-color: #ff4d4d;
    }

    label {
        color: #ff4d4d;
    }
}