/* style.css */

/* --- 1. Global Styles & Variables --- */
:root {
    --font-family: 'Inter', sans-serif;
    --bg-color: #f8fafc;
    --text-color: #334155;
    --header-text-color: #1e293b;
    --container-bg: #ffffff;
    --border-color: #e2e8f0;
    --header-bg: #f1f5f9;
    --time-color: #64748b;
    --hover-highlight: #e0f2fe;
    --button-bg: #2563eb;
    --button-hover-bg: #1d4ed8;
    --focus-ring-color: rgba(37, 99, 235, 0.2);

    /* Subject Colors */
    --c-ds: #7dd3fc;
    --c-os: #86efac;
    --c-cn: #fde047;
    --c-dbms: #e9d5ff;
    --c-aptitude: #fda4af;
    --c-project: #a5b4fc;
    --c-coding: #93c5fd;
    --c-revision: #9ca3af;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.planner-header {
    text-align: center;
    margin-bottom: 2rem;
}

.planner-header h1 {
    color: var(--header-text-color);
    font-weight: 700;
    font-size: 2.25rem;
    margin: 0;
}

.planner-header p {
    color: var(--time-color);
    margin-top: 0.5rem;
}


/* --- 2. Timetable Grid Layout --- */
.timetable-wrapper {
    background-color: var(--container-bg);
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    overflow-x: auto; /* For responsiveness on small screens */
}

.timetable-grid {
    display: grid;
    grid-auto-flow: column; /* This is the key fix: it tells the grid to fill columns first. */
    /* 8 columns: 1 for time, 7 for days */
    grid-template-columns: minmax(100px, 0.7fr) repeat(7, 1fr);
    /* 11 rows: 1 for headers, 10 for time slots */
    grid-template-rows: 50px repeat(10, 65px);
    min-width: 900px;
}

/* --- 3. Grid Cell Styling --- */
.grid-cell {
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Remove outer borders correctly for column flow */
.timetable-grid > .grid-cell:last-child {
    border-right: none;
}
.timetable-grid > .grid-cell:nth-child(11n) {
    border-bottom: none;
}


.day-header, .time-header {
    background-color: var(--header-bg);
    color: var(--header-text-color);
    font-weight: 700;
    position: sticky;
    top: 0;
    z-index: 10;
}

.time-slot, .time-header {
    color: var(--time-color);
    position: sticky;
    left: 0;
    background-color: var(--header-bg); /* Match header for consistency */
    z-index: 20;
}
.time-header { z-index: 30; }

.lunch-break {
    background-color: #f3f4f6;
    font-weight: 500;
}

.free-slot {
    background-color: #f9fafb;
}

/* --- 4. Subject & Hover Styles --- */
.study-slot, .free-slot {
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    cursor: pointer;
}

.study-slot:hover, .free-slot:hover {
    transform: scale(1.03);
    z-index: 40;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    background-color: var(--hover-highlight) !important; /* Overrides subject color on hover */
}

/* Style for when a cell is being edited */
.grid-cell[contenteditable="true"]:focus {
    outline: 2px solid var(--button-bg);
    box-shadow: 0 0 0 3px var(--focus-ring-color);
    transform: scale(1.03);
    z-index: 50;
}

.subject-ds     { border-left: 5px solid var(--c-ds); }
.subject-os     { border-left: 5px solid var(--c-os); }
.subject-cn     { border-left: 5px solid var(--c-cn); }
.subject-dbms   { border-left: 5px solid var(--c-dbms); }
.subject-aptitude { border-left: 5px solid var(--c-aptitude); }
.subject-project  { border-left: 5px solid var(--c-project); }
.subject-coding   { border-left: 5px solid var(--c-coding); }
.subject-revision { border-left: 5px solid var(--c-revision); }


/* --- 5. Print & Button Styles --- */
.print-container {
    text-align: center;
    margin-top: 2rem;
}

.print-button {
    background-color: var(--button-bg);
    color: white;
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

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

@media print {
    body {
        background-color: #fff;
        color: #000;
    }
    .container {
        padding: 0;
        max-width: 100%;
    }
    .print-button, .planner-header p {
        display: none;
    }
    .planner-header {
        margin-bottom: 1.5rem;
    }
    .timetable-wrapper {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    .timetable-grid {
        grid-template-columns: 0.6fr repeat(7, 1fr);
        min-width: 0;
    }
    .grid-cell {
        border-color: #ccc;
        font-size: 9px;
        padding: 0.4rem;
        -webkit-print-color-adjust: exact;
        color-adjust: exact;
    }
    .day-header, .time-header, .time-slot, .lunch-break, .free-slot {
        background-color: #f2f2f2;
    }
    .study-slot {
        background-color: #fff !important; /* Keep background white for printing */
    }
}