/* Reset Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /* outline: red solid 1px; */
}

:root {
    --bg-page: #f0f0f0;
    --bg-element: #ffffff;
    --text-main: #333333;
    --text-heading: #000000;
    --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-header: 0 2px 8px rgba(0, 0, 0, 0.06);
}

body.dark-mode {
    --bg-page: hsl(207, 26%, 17%);
    --bg-element: hsl(209, 23%, 22%);
    --text-main: hsl(0, 0%, 100%);
    --text-heading: hsl(0, 0%, 100%);
    --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-header: 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* Labels for Screen Readers (sr). Make sure they don't appear onscreen. */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1rem;
    background-color: var(--bg-element);
    color:  var(--text-heading);
    box-shadow: var(--shadow-header);
}

header h1 {
    font-size: 1.1rem;
    font-weight: 700;
}

header button {
    font-size: 0.95rem;
    border: 0;
    background-color: transparent;
    color: inherit;
    cursor: pointer;
    font-weight: 600;
}

main {
    padding: 1.5rem 1rem 3rem;
}

form {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2rem;
    margin-bottom: 2rem;
}

.search-bar {
    width: 100%;
}

form input {
    width: 100%;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    background-color: var(--bg-element);
    color: var(--text-main);
    box-shadow: var(--shadow-soft);
}

form input::placeholder {
    color: var(--text-main);
    opacity: 0.7;
}

form select {
    width: 200px;
    padding: 1rem;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    background-color: var(--bg-element);
    color: var(--text-main);
    box-shadow: var(--shadow-soft);
}

#countries-card-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
}

.country-card {
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--bg-element);
    box-shadow: var(--shadow-soft);
    width: 100%;
}

.country-card-flag-container {
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.country-card-flag-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.country-card-content {
    padding: 1.5rem;
    background-color: var(--bg-element);
}

.country-card-link {
    display: block;
    width: 100%;
    height: 100%;
    text-decoration: none;
    color: inherit;
}

#countries-card-container .country-card-link {
    display: block;
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

p {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

/* =========================
   Details Page
   ========================= */

.back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 1.5rem;
    margin-bottom: 4rem;
    border: none;
    border-radius: 6px;
    background-color: var(--bg-element);
    color: var(--text-main);
    box-shadow: var(--shadow-soft);
    font-size: 0.9rem;
    cursor: pointer;
}

#countries-card-details-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

#countries-card-details-container .country-card {
    display: grid;
    grid-template-columns: 1fr;
    background-color: transparent;
    box-shadow: none;
    border-radius: 0;
    overflow: visible;
    gap: 3rem;
}

#countries-card-details-container .country-card-flag-container {
    width: 100%;
    max-width: 560px;
    height: auto;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    box-shadow: none;
}

#countries-card-details-container .country-card-flag-detail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

#countries-card-details-container .country-card-content {
    padding: 0;
    background-color: transparent;
}

#countries-card-details-container .country-card-name {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 2rem;
    color: var(--text-heading);
}

.details-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.details-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.details-column li {
    margin-bottom: 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-main);
}

.details-column strong {
    font-weight: 700;
    color: var(--text-heading);
}

.border-countries {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.border-countries-label {
    font-weight: 700;
    color: var(--text-heading);
}

.border-country-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.border-country {
    min-width: 90px;
    padding: 0.45rem 1rem;
    border: none;
    border-radius: 4px;
    background-color: var(--bg-element);
    color: var(--text-main);
    box-shadow: var(--shadow-soft);
    font-size: 0.85rem;
    text-align: center;
    cursor: pointer;
}



@media (min-width: 700px) {
    header {
        padding: 1.5rem 2rem;
    }

    header h1 {
        font-size: 1.4rem;
    }

    main {
        padding: 2rem;
    }

    form {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .search-bar {
        flex: 1;
        max-width: 420px;
    }

    #countries-card-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 3rem;
    }
}

@media (min-width: 1100px) {
    header {
        padding: 1.5rem 3rem;
    }

    header h1 {
        font-size: 1.6rem;
    }

    main {
        padding: 3rem;
    }

    .search-bar {
        max-width: 480px;
    }

    #countries-card-container {
        grid-template-columns: repeat(4, 1fr);
        gap: 4rem;
    }
}

/* =========================
   Details Page Responsive
   ========================= */

@media (min-width: 700px) {
    #countries-card-details-container .country-card-name {
        font-size: 2.2rem;
    }

    .details-info {
        grid-template-columns: 1fr 1fr;
        column-gap: 2rem;   
        row-gap: 1rem;
    }

    .border-countries {
        flex-direction: row;
        align-items: center;
        flex-wrap: wrap;
        gap: 1rem 1.5rem;
    }
}

@media (min-width: 1100px) {
    #countries-card-details-container .country-card {
        grid-template-columns: minmax(300px, 560px) minmax(320px, 1fr);
        align-items: center;
        column-gap: 7rem;
    }

    #countries-card-details-container .country-card-name {
        margin-bottom: 2.25rem;
    }

     .details-info {
        column-gap: 2.5rem;
    }
}