/* ==========================================
   1. THEME VARIABLES (The Color Palette)
   ========================================== */
:root {
    --bg-color: #f0f2f5;
    --text-color: #333333;
    --card-bg: #ffffff;
    --border-color: #cccccc;
    --accent-color: #2196F3;
    --success-color: #4CAF50;
    --danger-color: #ff4d4d;
    --warning-color: #ffc107;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --input-bg: #ffffff;
    --input-border: #cccccc;
}

.dark-mode {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --border-color: #333333;
    --accent-color: #90caf9;
    --success-color: #81c784;
    --danger-color: #e57373;
    --warning-color: #ffd54f;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --input-bg: #2c2c2c;
    --input-border: #444444;
}

/* ==========================================
   2. GLOBAL STYLES
   ========================================== */
body {
    font-family: Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 20px;
    transition: background-color 0.3s ease, color 0.3s ease; /* Smooth fade for the whole page */
}

/* Base styling for inputs so they adapt to dark mode automatically */
input {
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* ==========================================
   3. COMPONENTS
   ========================================== */
/* The Card Look */
.locations {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Sleek navigation buttons */
.nav-btn {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 20px; /* The pill shape */
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: all 0.3s ease;
    margin-bottom: 20px;
}

.nav-btn:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
    transform: translateX(-4px); /* Tiny slide animation */
    box-shadow: 0 4px 8px var(--shadow-color);
}

/* --- THE DAY FILTER TABS --- */
.day-btn {
    background-color: transparent;
    color: var(--text-color);
    border: 2px solid var(--border-color);
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.2s ease;
}

.day-btn:hover {
    border-color: var(--accent-color);
}

.day-btn-active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.day-btn-add {
    background-color: var(--card-bg);
    color: var(--success-color);
    border: 2px dashed var(--success-color);
    font-size: 16px;
    padding: 4px 12px;
}
.day-btn-add:hover {
    background-color: var(--success-color);
    color: white;
}

/* ==========================================
   TOGGLE BUTTON THEME (VERTICAL WIPE)
   ========================================== */
.theme-toggle-btn {
    position: absolute; 
    top: 20px; 
    right: 20px; 
    padding: 8px 16px; 
    cursor: pointer; 
    border-radius: 20px; 
    border: 1px solid var(--border-color); 
    background: transparent; 
    font-size: 16px; 
    /* safely overrides the JavaScript color injections */
    color: var(--text-color) !important; 
    overflow: hidden; 
    z-index: 1; 
    transition: border-color 0.4s ease, color 0.4s ease;
}

/* 1. The Paint Bucket (Hidden below the button) */
.theme-toggle-btn::after {
    content: "";
    position: absolute;
    bottom: 0; 
    left: 0;
    width: 100%;
    height: 0%; 
    background-color: var(--text-color); 
    z-index: -1; 
    transition: height 0.4s cubic-bezier(0.25, 1, 0.5, 1); 
}

/* 2. The Trigger (When you hover, wipe up!) */
.theme-toggle-btn:hover::after {
    height: 100%; 
}

/* 3. The Text Invert */
.theme-toggle-btn:hover {
    color: var(--bg-color) !important;
}

/* --- MAP ROUTING TOGGLE BUTTONS --- */
.route-btn {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: none;
    border-right: 1px solid var(--border-color);
    padding: 8px 12px;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.route-btn:last-child {
    border-right: none;
}

.route-btn:hover {
    background-color: rgba(33, 150, 243, 0.1); 
}

.route-btn-active {
    background-color: var(--accent-color);
    color: white;
}

/* ==========================================
   4. ANIMATIONS & TRANSITIONS
   ========================================== */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(10px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.smooth-transition {
    animation: fadeIn 0.4s ease-out; 
}

/* ==========================================
   5. MOBILE RESPONSIVENESS
   ========================================== */
@media (max-width: 800px) {
    .mobile-stack {
        flex-direction: column !important;
        align-items: stretch !important;
    }
}

/* ==========================================
   6. LIBRARY OVERRIDES
   ========================================== */
/* changes calendar font to match rest of the site*/
   .flatpickr-calendar {
    font-family: inherit !important; 
}
/* Forces the map search bar text to stay black so it doesn't vanish in dark mode */
.leaflet-control-geocoder input {
    color: #000000 !important;
}

/* ==========================================
   7. WELCOME SCREEN UPGRADE
   ========================================== */
#page-welcome {
    min-height: 85vh;
    display: flex;
    justify-content: center; /* Centers horizontally */
    align-items: center;     /* Centers vertically */
    border-radius: 12px;
    margin-top: 10px;
    overflow: hidden;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.8)),
                url('https://images.unsplash.com/photo-1476514525535-07fb3b4ae5f1?q=80&w=2070&auto=format&fit=crop') center/cover no-repeat;
}

#welcome-stage {
    display: flex;
    flex-direction: row; /* Force side-by-side */
    align-items: center;
    justify-content: center;
    gap: 0; /* Starts at zero for perfect center */
    transition: gap 0.7s cubic-bezier(0.19, 1, 0.22, 1);
    width: 100%;
}

/* When active, the cards slide apart */
#welcome-stage.modal-active {
    gap: 40px;
}

/* --- THE GLASS CARD --- */
.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 60px 80px;
    border-radius: 24px;
    color: white;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.welcome-buttons { display: flex; gap: 15px; justify-content: center; }

/* THE BUTTONS (The cool formatting is back) */
.welcome-buttons button {
    padding: 14px 28px;
    border-radius: 8px;
    border: none;
    font-weight: bold;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
}

#btn-new-trip { background-color: var(--success-color); color: white; }
#btn-load-trips { background-color: var(--accent-color); color: white; }

.welcome-buttons button:hover {
    transform: translateY(-3px);
    filter: brightness(1.1);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

/* --- THE MODAL (SIDE-CARD) --- */
#new-trip-modal {
    background: var(--card-bg); /* Uses your theme colors */
    border: 1px solid var(--border-color);
    padding: 35px;
    border-radius: 20px;
    width: 340px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
    /* SLIDE ENGINES */
    opacity: 0;
    transform: translateX(100px); /* Start shifted right */
    transition: all 0.6s cubic-bezier(0.19, 1, 0.22, 1);
}

#new-trip-modal.show {
    opacity: 1;
    transform: translateX(0); /* Slide into view */
}

/* Modal UI Cleanup */
.modal-inputs input { width: 100%; margin-bottom: 12px; padding: 12px; border-radius: 8px; box-sizing: border-box; border: 1px solid #444444;}
.input-label { font-size: 12px; opacity: 0.7; margin: 0 0 5px 0; text-align: left; }
.modal-btns { display: flex; justify-content: space-between; margin-top: 15px; }
.modal-btns button { padding: 8px 16px; border-radius: 6px; border: none; color: white; cursor: pointer; }
#modal-cancel-btn { background: var(--danger-color); }
#modal-create-btn { background: var(--success-color); }

/* ==========================================
   8. MOBILE HOMEPAGE FIX
   ========================================== */
@media (max-width: 800px) {
    /* 1. Stack the stage vertically instead of side-by-side */
    #welcome-stage {
        flex-direction: column;
    }
    
    /* 2. Push them apart vertically when the modal opens */
    #welcome-stage.modal-active {
        gap: 20px;
    }

    /* 3. Shrink the massive desktop glass card */
    .glass-card {
        padding: 30px 20px;
        width: 90%; /* Forces it to fit inside the phone screen */
        max-width: 400px;
    }

    .glass-card h2 {
        font-size: 1.8em; /* Shrink the giant header */
    }

    /* 4. Stack the buttons so they don't break the container */
    .welcome-buttons {
        flex-direction: column;
        width: 100%;
    }

    .welcome-buttons button {
        width: 100%;
    }

    /* 5. Shrink the modal and make it slide UP instead of LEFT */
    #new-trip-modal {
        width: 90%;
        max-width: 400px;
        padding: 20px;
        transform: translateY(50px); /* Replaces the horizontal slide */
    }

    #new-trip-modal.show {
        transform: translateY(0);
    }
}

/* ==========================================
   9. AI CHATBOT WIDGET
   ========================================== */
#ai-chat-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

/* The floating button */
#ai-toggle-btn {
    background: linear-gradient(135deg, var(--accent-color), #9c27b0);
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: 30px;
    font-weight: bold;
    font-size: 15px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#ai-toggle-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 16px rgba(0,0,0,0.4);
}

/* The main window */
#ai-chat-window {
    width: 340px;
    height: 480px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform-origin: bottom right;
    animation: fadeIn 0.3s ease-out;
}

/* The header */
#ai-chat-header {
    background: linear-gradient(135deg, var(--accent-color), #9c27b0);
    color: white;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#ai-close-btn {
    background: transparent;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 18px;
    transition: transform 0.2s;
}
#ai-close-btn:hover { transform: scale(1.2); }

/* The scrolling message area */
#ai-chat-history {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background-color: var(--bg-color);
}

/* The Bubbles */
.chat-message {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: 18px;
    font-size: 13px;
    line-height: 1.4;
    animation: fadeIn 0.3s ease;
}

.ai-message {
    background-color: var(--card-bg);
    color: var(--text-color);
    align-self: flex-start;
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px; /* The little tail */
}

.user-message {
    background-color: var(--accent-color);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px; /* The little tail */
}

/* The input area */
#ai-chat-input-area {
    display: flex;
    padding: 12px;
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    gap: 8px;
}

#ai-user-input {
    flex: 1;
    margin-bottom: 0;
    padding: 10px;
}

#ai-send-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0 16px;
    cursor: pointer;
    font-weight: bold;
}