/* ----------------------------------------------------
   GLOBAL STYLE - MYEDUSPACE "ΙΣΟΡΡΟΠΙΑ"
---------------------------------------------------- */

/* Color Palette */
:root {
    --mint: #9EE6C8;
    --mint-dark: #86d7b4;
    --ice: #F5F9FA;
    --slate: #2F3A40;
    --soft-grey: #E7EEF0;
}

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

/* Global body */
body {
    background: var(--ice);
    font-family: "Arial", sans-serif;
    color: var(--slate);
    line-height: 1.5;
    position: relative;
}

/* ----------------------------------------------------
   GLOBAL WATERMARK LOGO - CENTER OF SCREEN
---------------------------------------------------- */

body::after {
    content: "";
    position: fixed;
    top: 50%;
    left: 50%;
    width: 420px; /* μέγεθος watermark */
    height: 420px;
    transform: translate(-50%, -50%);
    background-image: url('logo.png'); /* ίδιο folder με το style.css */
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;

    opacity: 0.06; /* τέλεια διαφάνεια για watermark */
    z-index: 0; /* πίσω από ΟΛΑ */
    pointer-events: none; /* δεν επηρεάζει clicks */
}

/* Βεβαιωνόμαστε ότι ΟΛΟ το περιεχόμενο είναι πάνω από το watermark */
* {
    position: relative;
    z-index: 1;
}


/* ---------------------------------------------------- */

/* Centered Container */
.centered-container {
    background: white;
    padding: 40px 50px;
    border-radius: 18px;
    width: 350px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    border-top: 8px solid var(--mint);
    animation: fadeIn 0.6s ease;
    margin: auto;
}

/* Titles */
h1, h2, h3 {
    color: var(--slate);
    font-weight: 700;
    margin-bottom: 20px;
    text-align: center;
}

/* Inputs */
input, select, textarea {
    width: 100%;
    padding: 10px;
    margin: 8px 0 18px;
    border: 1px solid #d7d7d7;
    border-radius: 8px;
    font-size: 15px;
    background: #fff;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border: 1px solid var(--mint);
    box-shadow: 0 0 5px rgba(158, 230, 200, 0.5);
}

/* Buttons */
.btn {
    width: 100%;
    background: var(--mint);
    color: var(--slate);
    font-weight: bold;
    border: none;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: 0.2s;
}

.btn:hover {
    background: var(--mint-dark);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    justify-items: center;
    align-items: stretch;
    gap: 20px;
    width: 100%;
    margin-top: 20px;
    padding-bottom: 40px;
}

/* Cards */
.card {
    background: white;
    padding: 25px;
    border-radius: 14px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
    border-left: 8px solid var(--mint);
    transition: 0.2s;
    width: 100%;
    max-width: 300px;
    min-height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

/* Navigation */
.navbar {
    width: 100%;
    background: white;
    padding: 15px 30px;
    border-bottom: 3px solid var(--mint);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.navbar-title {
    font-size: 22px;
    font-weight: 800;
    color: var(--slate);
}

/* Links */
a {
    color: var(--slate);
    font-weight: bold;
    text-decoration: none;
}

a:hover {
    color: var(--mint-dark);
}

/* Animations */
@keyframes fadeIn {
    from {opacity: 0; transform: translateY(20px);}
    to {opacity: 1; transform: translateY(0);}
}

/* Mobile */
@media (max-width: 600px) {
    .dashboard-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
        padding: 0 10px;
    }

    .card {
        padding: 18px;
        max-width: 260px;
        min-height: 130px;
    }

    .navbar-title {
        font-size: 18px;
    }

    .navbar {
        padding: 12px 20px;
    }

    body::after {
        width: 55px;
        height: 55px;
        top: 12px;
        right: 12px;
        opacity: 0.2;
    }
}
/* ===== Student layout – ORIGINAL STRUCTURE ===== */

.student-layout {
    display: flex;
    gap: 40px;
    max-width: 1200px;
    margin: 40px auto;
}

.student-left {
    flex: 2;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.student-right {
    flex: 1;
}

.student-right .card {
    position: sticky;
    top: 30px;
}