/* Generic */
* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body {
    font-family: sans-serif;
    background: #f6f8fb;
}

:root {
    --bg: #f6f8fb;
    --card: #ffffff;
    --muted: #6b7280;
    --accent: #0b5fff;
    --accent-2: #0366a6;
    --glass: rgba(255,255,255,0.6);

    --border-radius-small: 6px;
    --border-radius-large: 12px;
}

/* Header */
header {
    background: linear-gradient(90deg, rgba(11,95,255,0.12), rgba(3,102,166,0.06));
    border-bottom: 1px solid rgba(3,102,166,0.06);

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

    gap: 1rem;
    padding: 1rem 1.25rem;

    a {
        text-decoration: none;
    }
    h1 {
        color: black;

        font-size: 1.25rem;
        letter-spacing: 0.2px;

        display: flex;
        align-items: center;

        gap: 0.4rem;
    }

    details {
        position: relative;

        font-size: 0.9em;

        /* Summary */
        summary {
            list-style: none;
            cursor: pointer;

            padding: 0.35rem 0.75rem;
            border: 1px solid #ddd;
            border-radius: var(--border-radius-small);

            color: var(--accent-2);
            background: #ffffff;

            font-weight: 600;

            display: flex;
            align-items: center;

            gap: 0.4rem;

            transition: all 150ms ease;

            &:hover {
                background: #f0f4ff;
                border-color: var(--accent-2);
            }
            &::after {
                content: '▼';
                font-size: 0.7rem;
                transition: transform 200ms ease;
            }
        }

        &[open] summary::after {
            transform: rotate(-180deg);
        }

        /* Items */
        div {
            z-index: 50;
            
            position: absolute;
            top: calc(100% + 6px);
            left: 0;

            background: white;

            border-radius: var(--border-radius-large);
            box-shadow: 0 8px 20px rgba(2,6,23,0.06);

            display: none;
            flex-direction: column;

            a {
                padding: 0.5rem 0.75rem;
                color: var(--accent-2);
                text-decoration: none;
                border-bottom: 1px solid #f0f0f0;
                border-radius: 0;
                transition: background 150ms ease;

                &:hover {
                    background: #f0f4ff;
                }

                &:first-child {
                    border-radius: var(--border-radius-large) var(--border-radius-large) 0 0;
                }
                &:last-child {
                    border-radius: 0 0 var(--border-radius-large) var(--border-radius-large);
                }
            }
        }
        &[open] div {
            display: flex;
        }
    }

    button {
        cursor: pointer;
    }

    /* Navigation */
    nav {
        display: flex;
        align-items: center;

        gap: 0.6rem;
    }

    .notifications {
        color: var(--accent-2);
        background: #ffffff;
        
        text-decoration: none;
        font-weight: 600;
        
        padding: 0 0.5em;
        border: 1px solid #ddd;
        border-radius: var(--border-radius-small);

        transition: all 150ms ease;

        height: 2em;

        cursor: pointer;

        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5em;

        &:hover {
            background: #f0f4ff;
            border-color: var(--accent-2);
        }
    }

    .hamburger {
        display: none;

        color: var(--accent-2);
        background: #ffffff;
        
        text-decoration: none;
        font-weight: 600;
        
        padding: 0;
        border: 1px solid #ddd;
        border-radius: var(--border-radius-small);

        transition: all 150ms ease;

        width: 2em;
        height: 2em;

        cursor: pointer;

        &:hover {
            background: #f0f4ff;
            border-color: var(--accent-2);
        }
    }
    .side-menu {
        z-index: 100;

        position: fixed;
        display: flex;
        flex-direction: column;

        top: 0;
        width: fit-content;
        height: 100vh;

        background: #dbdbdb;

        transition: right 150ms ease;
        
        .close {
            display: inline-block;
            position: absolute;
            cursor: pointer;

            top: 0.5em;
            right: 0.5em;

            color: black;

            width: 2em;
            height: 2em;

            border-radius: var(--border-radius-small);

            transition: all 150ms ease;

            &:hover {
                background: #8d8d8d;
                border-color: var(--accent-2);
            }
        }
        .location-select, .boxed-button, .notifications {
            margin: 1em 3em 0em 1em;
        }

        /* Closed state */
        &[aria-pressed="false"] {
            right: -100%;
        }

        /* Opened state */
        &[aria-pressed="true"] {
            right: 0;
        }
    }
}

.main {
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Title */
.title {
    margin: 1rem;

    display: flex;
    flex-direction: column;
    align-items: center;

    h2.heading {
        font-size: 1.5rem;
    }
    h3.heading {
        font-size: 1.15rem;
    }
    .heading {
        font-weight: 700;
        color: #07203a;
    }

    .subtext {
        color: var(--muted);
        margin: 0.7rem 0 0 0;
    }

    .capture-navigation {
        display: flex;
        gap: 0.5rem;

        margin-top: 1rem;

        a {
            display: inline-block;
            color: black;

            padding: 0;

            border: 1px solid #ddd;
            border-radius: var(--border-radius-small);

            &:hover {
                background: #f0f4ff;
                border-color: var(--accent-2);
            }

            &.disabled {
                pointer-events: none;
                cursor: default;

                color: var(--muted)
            }
        }

        .icon-button {
            width: 2em;
            height: 2em;
        }
        .text-button {
            height: 2em;
            padding: 0.25em 1em;

            text-decoration: none;
        }
    }
}

/* Generic elements */
.card-box {
    background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(250,252,255,0.98));
    border: 1px solid rgba(16,24,40,0.04);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(2,6,23,0.03);
    
    .card {
        background: linear-gradient(180deg, #fff, #fbfdff);

        margin: 0.6rem;

        border: 1px solid rgba(16,24,40,0.03);
        border-radius: 16px;
        box-shadow: 0 14px 30px rgba(2,6,23,0.03);

        transition: transform 200ms ease, box-shadow 200ms ease;

        &:hover {
            transform: translateY(-4px);
            box-shadow: 0 14px 30px rgba(2,6,23,0.06);
        }
    }
}
.boxed-button {
    color: var(--accent-2);
    background: #ffffff;

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

    padding: 0.35rem 0.75rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius-small);

    transition: all 150ms ease;

    &:hover {
        background: #f0f4ff;
        border-color: var(--accent-2);
    }

    svg {
        fill: currentColor;
        line-height: 1;
        height: 10px;
        width: 10px;

        transition: fill 200ms ease;
    }
}

/* Main Layout */
.view {
    display: flex;
    align-items: flex-start;
    gap: 1rem;

    /* Media Display */
    .media {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;

        /* Image / Video Content */
        .content {
            display: block;
            width: 100%;
            max-width: 720px;

            img, video {
                width: 100%;
                height: auto;

                border: 1px solid rgba(16,24,40,0.06);
                border-radius: var(--border-radius-large);

                box-shadow: 0 6px 18px rgba(17,24,39,0.04);
            }

            img {
                display: block;
            }
            video {
                display: none;
            }
        }

        /* Metadata */
        .meta {
            display: flex;
            flex-direction: row;
            flex-wrap: wrap;

            justify-content: space-between;
            gap: 0.5rem;

            .info {
                color: var(--muted);
                font-size: 0.95rem;
                margin-top: 0.5rem;
            }

            /* Controls */
            .toggle-display {
                color: #333;
                background: #f0f0f0;

                height: 44px;
                width: fit-content;
                min-width: 250px;

                border: 1px solid #ddd;
                padding: 0;
                border-radius: 32px;

                cursor: pointer;
                font-weight: 600;
                font-size: 0.9rem;

                display: flex;
                align-items: center;

                position: relative;
                overflow: hidden;

                transition: all 200ms ease;

                svg {
                    fill: black;
                    line-height: 1;
                    height: 1em;
                    width: 1em;

                    transition: fill 200ms ease;
                }

                .toggle-option {
                    flex: 1;
                    z-index: 2;
                    
                    display: flex;
                    align-items: center;
                    justify-content: center;

                    gap: 0.4rem;
                    padding: 0 1.2rem;

                    color: #999;
                    font-size: 0.95rem;

                    transition: color 200ms ease;
                }

                .toggle-slider {
                    z-index: 1;

                    position: absolute;
                    top: 4px;

                    width: calc(50% - 4px);
                    height: calc(100% - 8px);

                    border-radius: 28px;

                    transition: all 250ms ease-in-out;
                }
                &:hover .toggle-slider {
                    box-shadow: 0 3px 10px rgba(255, 107, 53, 0.2);
                }

                /* Image state */
                &[aria-pressed="false"] {
                    .toggle-slider {
                        left: 4px;
                        background: linear-gradient(135deg, #07a1df 0%, #62b5e6 100%);
                    }
                    .toggle-image {
                        color: white;

                        svg {
                            fill: white;
                        }
                    }
                }
                /* Video state */
                &[aria-pressed="true"] {
                    .toggle-slider {
                        left: calc(50%);
                        background: linear-gradient(135deg, #bd23ec 0%, #cd49e7 100%);
                    }
                    .toggle-video {
                        color: white;

                        svg {
                            fill: white;
                        }
                    }
                }
            }
        }
    }
}

/* Trains List */
.trains {
    flex-shrink: 0;

    background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(250,252,255,0.98));
    border: 1px solid rgba(16,24,40,0.04);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(2,6,23,0.03);

    overflow: auto;

    .train-item {
        background: linear-gradient(180deg, #fff, #fbfdff);

        margin: 0.6rem;

        border: 1px solid rgba(16,24,40,0.03);
        border-radius: 16px;
        box-shadow: 0 14px 30px rgba(2,6,23,0.03);

        transition: transform 200ms ease, box-shadow 200ms ease;

        .header {
            display: flex;
            flex-direction: row;
            flex-wrap: wrap;

            justify-content: space-between;
            align-items: center;
            gap: 0.5rem;

            padding: 0.5rem 0.5rem 0.4rem 0.5rem;
            border-radius: 16px 16px 0 0;
            box-shadow: 0 14px 30px rgba(2,6,23,0.03);

            .info {
                .train-number {
                    font-size: 0.8em;
                    color: var(--muted)
                }
            }
            svg {
                fill: black;

                line-height: 1;
                height: 1em;
                width: 1em;

                transform: translateY(10%)
            }
            .badge {
                margin-left: 0;
            }
        }
        
        ul {
            padding: 0.7rem 2rem;

            li {
                line-height: 1.5;
            }
        }

        &:hover {
            transform: translateY(-4px);
            box-shadow: 0 14px 30px rgba(2,6,23,0.06);
        }
    }
}

/* Archive previews */
.preview-grid {
    width: 100%;

    /* See https://chriskirknielsen.com/blog/css-grid-with-a-preferred-column-count */
    --grid-cols: 7;
	--grid-gap: 1rem;
	--grid-size: 200px;

    display: grid;
	gap: var(--grid-gap);
	grid-template-columns: repeat(auto-fill, minmax(max(var(--grid-size), calc((100% - var(--grid-gap) * (var(--grid-cols) - 1)) / var(--grid-cols))), 1fr));

    justify-items: center;
    padding: var(--grid-gap);
    max-width: calc(var(--grid-cols) * (var(--grid-size) + var(--grid-gap)) + var(--grid-gap) + 2px);
}
.preview {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;

    width: 200px;

    color: white;

    img {
        width: 200px;
        aspect-ratio: 16 / 9;
        
        object-fit: cover;
        object-position: 0 100%;

        border-radius: 16px;
    }

    .overlay {
        position: absolute;

        &.top {
            background: linear-gradient(
                to bottom, 
                rgba(0, 0, 0, 0.6) 0%,
                rgba(0, 0, 0, 0.2) 50%,
                rgba(0, 0, 0, 0.0) 100%
            );
        }
        &.both {
            background: linear-gradient(
                to bottom, 
                rgba(0, 0, 0, 0.6) 0%,
                rgba(0, 0, 0, 0.2) 50%,
                rgba(0, 0, 0, 0.8) 100%
            );
        }

        width: 100%;
        height: 100%;

        border-radius: 16px;

        .preview-title {
            position: absolute;
            top: 0.25rem;

            width: 100%;
            text-align: center;
        }
        .capture-count {
            position: absolute;
            bottom: 0.5rem;

            width: 100%;
            text-align: center;
        }
    }
}

/* Badges */
.badge {
    height: fit-content;

    font-size: 0.8rem;
    font-weight: 700;

    padding: 0.18rem 0.45rem;
    border-radius: 999px;
    margin-left: 0.5rem;

    &.arrival {
        background: #e6f9f0;
        color: #0b7a4a;
        border: 1px solid rgba(11,122,74,0.15);
    }
    &.departure {
        background: #ffe6e6;
        color: #c41e3a;
        border: 1px solid rgba(196,30,58,0.15);
    }
    &.transit {
        background: #e6f4ff;
        color: #0366a6;
        border: 1px solid rgba(3,102,166,0.15);
    }
    &.stop {
        background: #f3e8ff;
        color: #7c3aed;
        border: 1px solid rgba(124,58,237,0.15);
    }
    &.towed {
        background: #fffacd;
        color: #997600;
        border: 1px solid rgba(153,118,0,0.06);
        font-size: 0.75rem;
        margin-left: 0.35rem;
    }
}

/* Responsive */
@media (max-width: 1000px) {
    .view {
        flex-direction: column;
        padding: 0 0.75rem;
    }
    .trains {
        width: 100%;
        max-height: 60vh;
    }
}
@media (max-width: 600px) {
    .meta {
        justify-content: space-around !important;
        gap: 0rem !important;

        button {
            width: 100% !important;
        }
    }
}
@media (max-width: 500px) {
    header nav {
        .notifications {
            display: none;
        }
        .location-select {
            display: none;
        }
        .boxed-button {
            display: none;
        }
        .hamburger {
            display: inline;
        }
    }
}