Estilos de ejemplo para http://code.ezakto.com/react/crear-administrador-de-notas-con-react.html

style.css

@import url(http://fonts.googleapis.com/css?family=Roboto:500);
@import url(http://fonts.googleapis.com/css?family=Roboto+Slab:300,400);
@import url(http://fonts.googleapis.com/css?family=Roboto+Condensed:700);

@font-face {
    font-family: 'icons';
    src: url(data:application/x-font-ttf;charset=utf-8;base64,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) format('truetype');
    font-weight: normal;
    font-style: normal;
}

[class*="-btn-"] {
    font-family: 'icons';
    speak: none;
    font-style: normal;
    font-weight: normal;
    font-variant: normal;
    text-transform: none;
    text-align: center;
    font-size: 22px;
    vertical-align: middle;
    line-height: 32px;
    width: 32px;
    height: 32px;
    display: inline-block;
    cursor: pointer;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

[class*="-btn-delete"]:before {
    content: "\e602";
}

[class*="-btn-list"]:before {
    content: "\e600";
}

body {
    background: #e8e8e8;
    font-family: 'Roboto Slab';
    color: rgba(0, 0, 0, 0.8);
}

#wrapper {
    max-width: 1040px;
    margin: 0 auto;
    padding-top: 30px;
}

::-webkit-input-placeholder { opacity: 1; color: rgba(0, 0, 0, 0.5); }
:-moz-placeholder { opacity: 1; color: rgba(0, 0, 0, 0.5); }
::-moz-placeholder { opacity: 1; color: rgba(0, 0, 0, 0.5); }
:-ms-input-placeholder { opacity: 1; color: rgba(0, 0, 0, 0.5); }
:input-placeholder { opacity: 1; color: rgba(0, 0, 0, 0.5); }

.addnote {
    width: 582px;
    background: #fff;
    box-shadow: 0 2px 1px rgba(0, 0, 0, 0.08);
    margin: 0 auto 30px;
    padding: 15px;
}

.addnote-title, .addnote-text {
    display: block;
    border: 0;
    margin: 0;
    padding: 0;
    width: 100%;
}

.addnote-title {
    font-family: 'Roboto Condensed';
    font-weight: bold;
    font-size: 17px;
    line-height: 23px;
    display: none;
}

    .addnote.open .addnote-title {
        display: block;
    }

.addnote-text {
    font-family: 'Roboto Slab';
    font-size: 14px;
    line-height: 19px;
    resize: none;
    height: 19px;
}

    .addnote.open .addnote-text {
        padding: 12px 0 15px;
    }

.addnote-toolbar {
    line-height: 37px;
    padding: 12px 0 4px;
    margin: 0 0 -15px -15px;
    display: none;
}

    .addnote.open .addnote-toolbar {
        display: block;
    }

.addnote-toolbar button {
    font-family: 'Roboto';
    text-transform: uppercase;
    font-size: 13px;
    font-weight: 500;
    float: right;
    border: 0;
    margin: 0;
    padding: 5px 14px;
    border-radius: 3px;
    background: transparent;
}

    .addnote-toolbar button:hover {
        background: rgba(0, 0, 0, 0.08);
        cursor: pointer;
    }

    .addnote-toolbar a {
        margin: 0 8px;
        color: rgba(0, 0, 0, 0.55);
    }

        .addnote-toolbar a:hover {
            color: rgba(0, 0, 0, 0.8);
        }

.note {
    display: block;
    float: left;
    width: 25%;
    padding: 8px;
    box-sizing: border-box;
}

.note-text {
    background: #fff;
    box-shadow: 0 2px 1px rgba(0, 0, 0, 0.08);
    padding: 15px 15px 60px;
    font-weight: 300;
}

    .note:hover .note-text {
        box-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
    }

    .note-text p {
        margin: 0;
        word-wrap: break-word;
    }

        .note-text p.text-shortest { font-size: 48px; font-weight: 100; }
        .note-text p.text-short { font-size: 36px; font-weight: 100; }
        .note-text p.text-medium { font-size: 24px; font-weight: 300; }
        .note-text p.text-long { font-size: 18px; }
        .note-text p.text-longest { font-size: 14px; }

.note-toolbar {
    padding: 4px 0;
    line-height: 37px;
    height: 37px;
    margin: -45px 0 0;
    background: rgba(0, 0, 0, 0.25);
    opacity: 0;
    transition: opacity 0.218s ease-in;
}

    .note:hover .note-toolbar {
        opacity: 1;
    }

    .note-toolbar a {
        margin: 0 8px;
        color: rgba(255, 255, 255, 0.8);
    }