/* CSS Variables from your main website's theme */
:root {
    --bg-color: #0d1117;
    --primary-color: #c9d1d9;
    --accent-color: #58a6ff;
    --border-color: #30363d;
    --card-bg: rgba(22, 27, 34, 0.8);
    --glow-color: rgba(88, 166, 255, 0.2);
    --danger-color: #f85149;
    --font-family: 'Poppins', sans-serif;
}

/* Basic Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--primary-color);
    font-family: var(--font-family);
    min-height: 100vh;
    padding: 1rem;
    overflow-x: hidden;
}

h2, h3, h4 {
    font-weight: 600;
}

/* Particle.js Background Styling */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
}

/* Main Content Container */
.container, #auth-screen {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Card Styling (Glassmorphism) */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    margin-bottom: 1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 8px 30px -5px var(--glow-color);
    transform: translateY(-5px);
}

/* Buttons */
.btn {
    background: var(--accent-color);
    color: var(--bg-color);
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    padding: .6rem 1.2rem;
    cursor: pointer;
    font-size: .9rem;
    font-weight: 600;
    transition: all .2s ease;
}
.btn:hover {
    background: #79bbff;
    border-color: #79bbff;
    box-shadow: 0 0 15px var(--glow-color);
}
.btn.ghost {
    background: transparent;
    color: var(--accent-color);
}
.btn.ghost:hover {
    background: rgba(88, 166, 255, 0.1);
    color: #79bbff;
}
.btn.danger {
    color: var(--danger-color);
    border-color: var(--danger-color);
}
.btn.danger:hover {
    background: rgba(248, 81, 73, 0.1);
    color: #ff6e67;
}


/* Inputs & Selects */
input, select {
    width: 100%;
    padding: .75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: .9rem;
    background-color: #0d1117;
    color: var(--primary-color);
    font-family: var(--font-family);
    margin-bottom: .5rem;
}
input:focus, select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--glow-color);
}
select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%2358a6ff' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}


/* Header */
header { margin-bottom: 1.5rem; }

/* Auth Screen */
#auth-screen { max-width: 450px; }

/* Modal */
#modal-root {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(5px);
  z-index: 50;
  overflow-y: auto;
  padding: 1rem;
}
#modal-root:empty { display: none; }
#modal-root .modal {
  padding: 1.5rem;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}
.modal .detail-exercise {
    border-left: 3px solid var(--accent-color);
    padding-left: 1rem;
    margin-bottom: 1rem;
}

/* Chart */
canvas { width: 100% !important; height: auto !important; }

/* Utility */
.hidden { display: none !important; }
.row { display: flex; align-items: center; flex-wrap: wrap;}
.row.gap > * { margin-right: .75rem; margin-bottom: .75rem;}
.row.space-between { justify-content: space-between; }
.stack { display: flex; flex-direction: column; gap: .5rem; }
.mt { margin-top: 1.5rem; }
.mt-sm { margin-top: .75rem; }
.muted { color: #8b949e; }

/* =======================================
   === NEW: Responsive Design for Mobile ===
   ======================================= */

/* For Tablets and smaller devices */
@media (max-width: 768px) {
    .container, #auth-screen {
        margin: 1rem auto;
    }
    .card {
        padding: 1rem;
    }
}

/* For Mobile Phones */
@media (max-width: 600px) {
    body {
        padding: 0.5rem;
    }

    /* Disable hover effects on mobile */
    .card:hover {
        transform: none;
        box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    }

    .btn:hover {
        /* Reset hover for touch */
        background: var(--accent-color);
        border-color: var(--accent-color);
        box-shadow: none;
    }
    .btn.ghost:hover {
        background: transparent;
    }
    .btn.danger:hover {
        background: transparent;
    }

    header.row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}